WSR 12-16-086

PROPOSED RULES

BUILDING CODE COUNCIL


[ Filed July 31, 2012, 3:34 p.m. ]

Original Notice.

Preproposal statement of inquiry was filed as WSR 12-03-111.

Title of Rule and Other Identifying Information: Adoption and amendment of the 2012 International Energy Conservation Code (IECC) (Residential), chapter 51-11R WAC, and repeal of chapter 51-11 WAC.

Hearing Location(s): Center Place Event Center, 2426 North Discovery Place, Spokane Valley, WA 99216, on September 14, 2012, at 10 a.m.; and at the DES Presentation Room, 1500 Jefferson S.E., Olympia, WA 98504, on September 21, 2012, at 10 a.m.

Date of Intended Adoption: November 9, 2012.

Submit Written Comments to: Ray Allshouse, Chair, State Building Code Council (SBCC), P.O. Box 41449, Olympia, WA 98504-1449, e-mail sbcc@ga.wa.gov, fax (360) 586-9088, by September 21, 2012.

Assistance for Persons with Disabilities: Contact Peggy Bryden by September 7, 2012, (360) 407-9280.

Purpose of the Proposal and Its Anticipated Effects, Including Any Changes in Existing Rules: The proposed rules adopt the 2012 edition of the IECC with amendments to incorporate requirements from the 2009 Washington State Energy Code, increase clarity, and increase energy efficiency as required in RCW 19.27A.160. As part of this adoption, the Energy Code is recodified as two separate WACs: Chapter 51-11R WAC for residential requirements and chapter 51-11C WAC for commercial requirements. Default building assembly values previously found in Chapter 10 of the Energy Code can now be found in Appendix A of chapter 51-11C WAC and are applicable to both. Fenestration default values are found in Section R303.1.3.

Summary of Proposed Changes:

1. Change of Scope. With the adoption of the 2012 IECC, the definition of "residential" has changed. Chapter 51-11R WAC now applies to detached one- and two-family dwellings and townhouses AND Group R-2, and R-3 buildings three stories or less. Clarifying language is added that converted spaces must be brought into full compliance (R101.4.4).

2. Climate Zones. The climate zones in the Energy Code have changed to reflect those of the IECC. Washington state is now comprised of three climate zones: Climate Zone 4 Marine, Climate Zone 5, and Climate Zone 6. For the residential code, Climate Zones 4 Marine and 5 share the same requirements. See Table R301.1 for a county by county breakdown of climate zones.

3. Prescriptive Envelope Requirements. The code no longer has multiple paths for prescriptive compliance. Door U-factors are now the same as window U-factors. Wood wall requirements in Climate Zone 6 (Ferry, Okanogan, Pend Oreille and Stevens counties) have increased. Values can be found in Tables R402.1.1 and R402.1.3. Insulation for slab-on-grade floors in Climate Zone 6 are required to extend forty-eight inches instead of twenty-four inches.

4. Air Leakage Requirements. Specific air barrier requirements and insulation details are provided in Table R402.4.1.1. Testing results are measured in ACH rather than SLA. The requirement is for 5 ACH, which is slightly better than the 2009 code. Specific maximums for window and door leakage rates are added (R402.4.3).

5. Mechanical Requirements. Lockout controls for heat pumps (R403.1.2) was changed from 32 to 35 degrees to correspond with control capabilities. Duct insulation is set at a minimum of R-8 (R403.2). The IECC contains a requirement for air handlers to be sealed (R403.2.2.1). Hot water piping insulation was changed to R-4 (R403.4.2). The IECC carries minimum requirements for mechanical ventilation fan efficiency (R403.5) and snow melt systems (R403.8). Systems serving multiple dwelling units are directed to comply with Sections C403 and C404 of chapter 51-11C WAC. Pool heaters are required to be equipped with time switches (R403.9.2)

6. Lighting Requirements. The IECC requires that seventy-five percent of installed lamps be high efficiency (R404.1). Fuel gas lighting systems are prohibited from having continuously burning pilots (R404.1.1).

7. Simulated Performance Alternative. The systems analysis approach now includes heating, cooling and service water heating energy only (R405.1). Depending on the size of the dwelling, the analysis must be between eighty-three and ninety-seven percent of the standard reference design (R405.3) to incorporate requirements from R406.

8. Additional Energy Efficiency Requirements. Section R406 contains requirements for one- and two-family dwellings and townhouses. Depending on the size of the dwelling, they are required to achieve between 0.5 to 2.5 credits (R406.2). The list of options (Table 406.2) has been reorganized and additional options have been added for air leakage and HVAC equipment.

To review a copy of the residential IECC with all changes to the model code marked, see https://fortress.wa.gov/ga/apps/SBCC/File.ashx?cid=2251. Changes to incorporate 2009 WSEC provisions are shown in black strikethrough/underline formatting, while changes from code change proposals received are shown in track changes mode.

General layout of 2012 IECC:

Chapter 1: Scope, Admin and Enforcement

Chapter 2: Definitions

Chapter 3: General requirements

R301 - Climate Zones

R302 - Design Conditions

R303 - Materials, Systems and Equip

Appendix C: Exterior Design Conditions

Chapter 4: Residential Energy Efficiency

R401 - General Requirements

R402 - Building Thermal Envelope

R403 - Mechanical Systems

R404 - Electrical Power and Lighting

R405 - Simulated Performance Alternative

R406 - Additional Energy Efficiency Requirements

Chapter 5: Reference Standards

Reasons Supporting Proposal: RCW 19.27A.020, 19.27A.160.

Statutory Authority for Adoption: RCW 19.27A.020, 19.27A.025, 19.27A.045, 19.27A.160.

Statute Being Implemented: Chapters 19.27, 19.27A, and 34.05 RCW.

Rule is not necessitated by federal law, federal or state court decision.

Agency Comments or Recommendations, if any, as to Statutory Language, Implementation, Enforcement, and Fiscal Matters: The council is seeking comments on the issues proposed in the rules shown below.

Name of Proponent: SBCC, governmental.

Name of Agency Personnel Responsible for Drafting and Implementation: Krista Braaksma, 1500 Jefferson S.E., P.O. Box 41449, Olympia, WA, (360) 407-9278.

A small business economic impact statement has been prepared under chapter 19.85 RCW.

Small Business Economic Impact Statement

Impact on Small Business: The SBCC/council is filing a proposed rule to adopt the 2012 edition of the IECC with state amendments (chapter 51-11 WAC). Since 1989 the SBCC has been responsible for updating the state Energy Code to improve energy efficiency in buildings, as required by chapter 19.27A RCW, and more recently has been tasked by the legislature to meet advanced energy efficiency targets. The council and its Energy Code technical advisory group have proposed about one hundred seventy-five amendments to this model code. These amendments were created to (1) maintain the stringency of the 2009 State Energy Code, (2) clarify and coordinate code requirements and (3) achieve legislatively mandated improvements in the energy efficiency of buildings.

The council has identified twenty-four of these state amendments that have economic impact. In addition, the model code itself contains another thirty provisions that are more stringent than the current state code.

A technical advisory group (TAG) was appointed by the council to review and amend the 2012 IECC. The TAG included all sectors of the construction industry and regulatory community, including small businesses. A paragraph-by-paragraph review of the entire code was undertaken, and the IECC was modified with existing Washington state requirements where those were more stringent or more clearly worded. The TAG and council then reviewed each of the one hundred seventy-one new amendments proposed by the public, and in some cases made extensive modifications to those proposals. All TAG meetings were open to the public, and small businesses participated actively in the process.

The majority of the amendments to the new code provide more clarity and consistency, which will streamline compliance for all stakeholders. However, the transition to the new code will require some general expenditures for design and construction businesses during the transition period, including small businesses. The degree of these impacts will diminish during the code cycle as rules become familiar and construction practices adjust. Where a code requirement increases the cost of a service or material, those businesses may see decreased revenue. Conversely, where a code requirement requires additional services or building materials, the businesses supplying those services and materials may see increased revenue.

The Cost Impact on Small Businesses Compared to the Largest Businesses in the State Will Not Be Disproportionate: Each aspect of the new code was discussed and debated in the TAG and at the council, both of which worked to mitigate the cost and maximize the energy savings of each provision. Wherever small businesses appeared to be disproportionately impacted by a code provision, the code was modified to mitigate or eliminate that difference.

The council has found that in a competitive bidding climate, construction costs per square foot are similar between large and small industry firms. The cost to businesses of building permit plan review and inspection will not be affected by adoption of the new edition.

The impact on jobs is anticipated to be neutral or slightly positive for construction industry workers.

Section I: Introduction/Compliance With the Rules: For a complete list of all state amendments contained in the proposed 2012 WSEC see this link: https://fortress.wa.gov/ga/apps/sbcc/Page.aspx?nid=116.

The primary change from the current code is adoption of a national model code, the 2012 IECC. Use of a national standard in place of a unique state code will generally simplify compliance and make more code resources available for practitioners. Most of the one hundred seventy-five proposed amendments to this code coordinate and clarify the rules, reducing the cost of compliance. Others transfer existing and familiar provisions from the existing state Energy Code into the amended IECC, and are thus cost neutral. A third category of amendments are intended to optimize energy efficiency. These typically decrease energy use in the building, and thus pay for their increased construction costs over time.

Beyond expenses related to the transition to the new code format, there will be little or no additional expenses related to reporting, recordkeeping or administrative code compliance paperwork. Where TAG members noted ambiguity or unwarranted complexity, the proposed code provision was modified to mitigate such difficulties. Local code officials were represented at all TAG meetings and actively intervened to ensure that plan review and field inspection work was not made more complicated or difficult than it is under the current code.

Section II: Compliance Costs for Washington Businesses: The 2012 IECC and the proposed amendments do contain significant new requirements, requiring additional expenditures by building owners. These construction costs will typically be offset by energy savings during the life of the building. The council identified the provisions as impacting construction cost and savings in comparison with the current Energy Code, as listed in Appendix A.

Section III: Analysis of Proportionate Impact on Small Businesses:

The Impact on Small Businesses as Compared With the Largest Businesses in the State Will Not Be Disproportionate: The majority of Washington state firms in the design and construction fields qualify as small businesses. In some cases, larger firms may be able to negotiate lower costs for materials and subcontracts than smaller firms. In other cases, smaller firms are able to be more competitive due to lower overhead costs. Apart from those general trends however, construction is a competitive marketplace where specific contracts are won without regard to the number of employees on the bidder's staff. For this reason, the incremental costs of meeting the 2012 Energy Code are generally proportionate between large and small businesses.

Section IV: Small Business Involvement and Impact Reduction Efforts:

Actions Taken to Reduce the Impact of the Rule on Small Businesses: The TAG identified specific amendments with a cost impact and modified the code to reduce the impact while maintaining the intent of the code. Where the SBCC found the cost of compliance for small businesses to be disproportionate, the proposed rule mitigates the cost. The proposed rule includes a definition of small business and provides exceptions for compliance with the updated regulation.

Involvement of Small Business in the Development of the Proposed Rules: A TAG composed of representatives from all sectors of industry and government reviewed the proposed changes to the 2012 WSEC.

For a directory of TAG members see https://fortress.wa.gov/ga/apps/sbcc/Page.aspx?nid=116.

Section V: Number of Affected Businesses in Washington:


Type of Business NAICS

CODE #

# IN STATE

(UP TO 49 Employees)

#IN STATE

(50 OR MORE Employees)

Homebuilders 236115 3985 12
Multifamily Housing Construction 236116 77 0
Residential Remodelers 236118 3468 1
Industrial Building Construction 236210 89 6
Commercial and Institutional Building Construction 236220 1305 40
Roofing Contractors 238160 973 7
Wood Window and Door Manufacturing 321911 39 2
Masonry Contractors 238140 572 1
Plumbing, Heating, Air Conditioning Contractors 238220 2319 48
Insulation Contractors 238310 1006 12
Architects 541310 602 16
Engineers 541330 1665 96

Section VI: Jobs Created or Lost as a Result of These Rules: The adoption of the latest code edition is not expected to significantly impact the number of jobs in the construction industry. These rules are likely to be job neutral overall, i.e., they will not result in any job gains or losses.

The construction industry continues to experience slow growth. Employment in all sectors impacts activity in the construction sector. According to Washington Occupational Employment Projections, posted by the department of employment security, the total number of construction trade workers statewide was 124,612 in the second quarter of 2011. There is an estimated increase of 0.6 percent by the second quarter of 2013, for a total number of construction trade workers of 126,093. Specialty trades show a similar pattern of slow growth by the second quarter of 2013:


Carpenters 33,821 +0.4%
Construction laborers 16,592 +0.5%
Plumbers, pipefitters 8,885 +0.3%

Some sectors are expected to experience slightly more positive growth. The number of engineers employed in Washington is expected to grow in this same period about 2.2 percent to 54,769.


2012 Washington State Energy Code SBEIS Appendix A

Costs and Energy Impacts of 2012 Residential Energy Code

For IECC Climate Zones 4 and 5, as

compared with current (2009) WSEC



Section Changes with Significant Cost Construction Cost Impacts Energy Savings Building Types Trades Impacted
R101.4.4 Alterations - unheated to heated space:

Requirement for spaces going from unheated to heated to come up to code completely.

+ May require upgrades to wall, window, door and slab edge, as well as lighting controls. + Savings may be extensive if existing space envelope (for garage, unheated basement, etc.) is uninsulated or poorly insulated. Residential remodeling, conversion of unheated space to living space. Insulation, windows, doors, lighting.
R406.2 Residential efficiency credits:

Increases the number of required credits from 1.0 to 1.5.

+ Cost for additional credits will vary according to selection by owner. + Energy savings expected to be approximately 3.5 percent. All. Varies.

Section Changes with Limited Cost Construction Cost Impacts Energy Savings Building Types Trades Impacted
R402.4.1.2 Air leakage: With change in test standard, air leakage is reduced from (approx.) 5.5 ACH50 to 5.0 ACH50. -- Slight cost difference, since most homes meet this standard already. + Savings estimate of approximately one percent of total home energy use. All. Envelope sealing.
R402.4.2 Fireplace damper: Fireplaces must have tight-fitting damper and outdoor combustion air. + Cost of damper and combustion air source.

Note: This is currently a requirement under the IRC.

+ Reduction in heat lost up chimney and air infiltration during fireplace operation. Houses with fireplaces. Fireplace.
R402.4.3 Fenestration air leakage: Door and window air leakage rate limits 0.3 cfm/SF for windows, 0.5 cfm for doors. + May be additional cost for doors and windows labeled with tested air leakage rate. However, since envelope field testing is already required, the improved fenestration may make air barrier compliance easier. + (slight) Overall envelope is already being tested anyway. All. Window, door.
R403.2.2.1 Air handler sealing: Air handlers must be sealed for max two percent leakage. + Since the IECC is a national standard, all air handlers will soon be required to comply, so there may be no extra cost. + Reduction in air leakage losses at air handler. All. HVAC.
R403.5.1

Table

Fan efficacy: Ventilation fan efficacy limits. + As a national standard, this requirement should become part of standard fan performance, so there may be no extra cost. + Reduced fan energy. All. HVAC.
R403.8 Snow melt controls: Snow melt systems require auto shutoff when air temp is above forty and auto or manual shutoff when pavement temp is above fifty. + (slight) Adds cost of thermal sensors and switch. + Prevents snow melt from being left on during warmer weather (or perhaps permanently). Homes with snow melt systems. Snow melt systems and controls.
R403.9.2 Pool and spa controls: Requires time switches on heaters for pools and permanent in-ground spas. + (slight) Pool heater controls must include auto time switch, unless they have built-in timer. + Can prevent pool heater from running during hours when not needed. Homes with pools and in-ground spas. Pool and spa.
R404.1 Lamps vs. luminaires: Change from luminaire efficacy to lamp type as basis for code. Allows std [standard] screw-base fixtures. (-) Reduced costs for more common light fixtures and lamps. -- No long-term energy use impact, since incandescent lamps are being phased out at the federal level. All. Lighting.

A copy of the statement may be obtained by contacting Tim Nogler, SBCC, P.O. Box 41449, Olympia, WA 98504-1449, phone (360) 407-9280, fax (360) 586-9088, e-mail sbcc@ga.wa.gov.

A cost-benefit analysis is not required under RCW 34.05.328. The SBCC is not one of the agencies identified as required to prepare an analysis. However, the council intends to prepare an analysis prior to the final adoption of these rules and a copy can be requested using the same information as provided for the small business economic impact statement.

July 31, 2012

Ray Allshouse

Council Chair

OTS-4886.1

Chapter 51-11R WAC

STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE 2012 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL


NEW SECTION
WAC 51-11R-10000   Chapter 1 [RE] -- Scope and administration.  

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-10100   Section R101 -- Scope and general requirements.  


R101.1 Title. This code shall be known as the International Energy Conservation Code of [NAME OF JURISDICTION], and shall be cited as such. It is referred to herein as "this code."


R101.2 Scope. This code applies to residential buildings and the buildings sites and associated systems and equipment. This code shall be the maximum and minimum energy code for residential construction in each town, city and county.


R101.3 Intent. This code shall regulate the design and construction of buildings for the effective use and conservation of energy over the useful life of each building. This code is intended to provide flexibility to permit the use of innovative approaches and techniques to achieve this objective. This code is not intended to abridge safety, health or environmental requirements contained in other applicable codes or ordinances.


R101.4 Applicability. Where, in any specific case, different sections of this code specify different materials, methods of construction or other requirements, the most restrictive shall govern. Where there is a conflict between a general requirement and a specific requirement, the specific requirement shall govern.


R101.4.1 Existing buildings. Except as specified in this chapter, this code shall not be used to require the removal, alteration or abandonment of, nor prevent the continued use and maintenance of, an existing building or building system lawfully in existence at the time of adoption of this code.


R101.4.2 Historic buildings. The building official may modify the specific requirements of this code for historic buildings and require in lieu of alternate requirements which will result in a reasonable degree of energy efficiency. This modification may be allowed for those buildings or structures that are listed in the state or national register of historic places; designated as a historic property under local or state designation law or survey; certified as a contributing resource with a national register listed or locally designated historic district; or with an opinion or certification that the property is eligible to be listed on the national or state registers of historic places either individually or as a contributing building to a historic district by the state historic preservation officer or the keeper of the national register of historic places.


R101.4.3 Additions, alterations, renovations or repairs. Additions, alterations, renovations or repairs to an existing building, building system or portion thereof shall conform to the provisions of this code as they relate to new construction without requiring the unaltered portion(s) of the existing building or building system to comply with this code. Additions, alterations, renovations or repairs shall not create an unsafe or hazardous condition or overload existing building systems. An addition shall be deemed to comply with this code if the addition alone complies or if the existing building and addition comply with this code as a single building.


EXCEPTION: The following need not comply provided the energy use of the building is not increased:
1. Storm windows installed over existing fenestration.
2. Glass only replacements in an existing sash and frame.
3. Existing ceiling, wall or floor cavities exposed during construction provided that these cavities are filled with insulation. 2x4 framed walls shall be insulated to a minimum of R-15 and 2x6 framed walls shall be insulated to a minimum of R-21.
4. Construction where the existing roof, wall or floor cavity is not exposed.
5. Reroofing for roofs where neither the sheathing nor the insulation is exposed. Roofs without insulation in the cavity and where the sheathing or insulation is exposed during reroofing shall be insulated either above or below the sheathing.
6. Replacement of existing doors that separate conditioned space from the exterior shall not require the installation of a vestibule or revolving door, provided, however, that an existing vestibule that separates a conditioned space from the exterior shall not be removed.
7. Alterations that replace less than 60 percent of the luminaires in a space, provided that such alterations do not increase the installed interior lighting power.
8. Alterations that replace only the bulb and ballast within the existing luminaires in a space provided that the alteration does not increase the installed interior lighting power.

The building official may approve designs of alterations or repairs which do not fully conform with all of the requirements of this code where in the opinion of the building official full compliance is physically impossible and/or economically impractical and:

1. The alteration or repair improves the energy efficiency of the building; or

2. The alteration or repair is energy efficient and is necessary for the health, safety, and welfare of the general public.


R101.4.3.1 Mechanical systems. When a space-conditioning system is altered by the installation or replacement of space-conditioning equipment (including replacement of the air handler, outdoor condensing unit of a split system air conditioner or heat pump, cooling or heating coil, or the furnace heat exchanger), the duct system that is connected to the new or replacement space-conditioning equipment shall be tested as specified in RS-33. The test results shall be provided to the building official and the homeowner.


EXCEPTIONS: 1. Duct systems that are documented to have been previously sealed as confirmed through field verification and diagnostic testing in accordance with procedures in RS-33.
2. Ducts with less than 40 linear feet in unconditioned spaces.
3. Existing duct systems constructed, insulated or sealed with asbestos.
4. Additions of less than 750 square feet.

R101.4.4 Change in occupancy or use. Any space not within the scope of Section R101.2 which is converted to space that is within the scope of Section R101.2 shall be brought into full compliance with this code.

Spaces undergoing a change in occupancy that would result in an increase in demand for either fossil fuel or electrical energy shall comply with this code.


R101.4.5 Change in space conditioning. Any nonconditioned space that is altered to become conditioned space shall be required to be brought into full compliance with this code.


R101.4.6 Mixed occupancy. Where a building includes both residential and commercial occupancies, each occupancy shall be separately considered and meet the applicable provisions of the IECC - Commercial and Residential Provisions.


R101.5 Compliance. Residential buildings shall meet the provisions of IECC - Residential Provisions. Commercial buildings shall meet the provisions of IECC - Commercial Provisions.


R101.5.1 Compliance materials. The code official shall be permitted to approve specific computer software, worksheets, compliance manuals and other similar materials that meet the intent of this code.


R101.5.2 Low energy buildings. The following buildings, or portions thereof, separated from the remainder of the building by building thermal envelope assemblies complying with this code shall be exempt from the building thermal envelope provisions of this code.

1. Those with a peak design rate of energy usage less than 3.4 Btu/h ft2 (10.7 W/m2) or 1.0 watt/ft2 (10.7 W/m2) of floor area for space conditioning purposes.

2. Those that do not contain conditioned space.

3. Greenhouses isolated from any conditioned space and not intended for occupancy.

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-10200   Section R102 -- Alternate materials -- Method of construction, design or insulating systems.  


R102.1 General. This code is not intended to prevent the use of any material, method of construction, design or insulating system not specifically prescribed herein, provided that such construction, design or insulating system has been approved by the code official as meeting the intent of this code.

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NEW SECTION
WAC 51-11R-10300   Section R103 -- Construction documents.  


R103.1 General. Construction documents and other supporting data shall be submitted in one or more sets with each application for a permit. The construction documents shall be prepared by a registered design professional where required by the statutes of the jurisdiction in which the project is to be constructed. Where special conditions exist, the code official is authorized to require necessary construction documents to be prepared by a registered design professional.


EXCEPTION: The code official is authorized to waive the requirements for construction documents or other supporting data if the code official determines they are not necessary to confirm compliance with this code.

R103.2 Information on construction documents. Construction documents shall be drawn to scale upon suitable material. Electronic media documents are permitted to be submitted when approved by the code official. Construction documents shall be of sufficient clarity to indicate the location, nature and extent of the work proposed, and show in sufficient detail pertinent data and features of the building, systems and equipment as herein governed. Details shall include, but are not limited to, as applicable, insulation materials and their R-values; fenestration U-factors and SHGCs; area-weighted U-factor and SHGC calculations; mechanical system design criteria; mechanical and service water heating system and equipment types, sizes and efficiencies; economizer description; equipment and systems controls; fan motor horsepower (hp) and controls; duct sealing, duct and pipe insulation and location; lighting fixture schedule with wattage and control narrative; and air sealing details.


R103.3 Examination of documents. The code official shall examine or cause to be examined the accompanying construction documents and shall ascertain whether the construction indicated and described is in accordance with the requirements of this code and other pertinent laws or ordinances.


R103.3.1 Approval of construction documents. When the code official issues a permit where construction documents are required, the construction documents shall be endorsed in writing and stamped "Reviewed for Code Compliance." Such approved construction documents shall not be changed, modified or altered without authorization from the code official. Work shall be done in accordance with the approved construction documents.

One set of construction documents so reviewed shall be retained by the code official. The other set shall be returned to the applicant, kept at the site of work and shall be open to inspection by the code official or a duly authorized representative.


R103.3.2 Previous approvals. This code shall not require changes in the construction documents, construction or designated occupancy of a structure for which a lawful permit has been heretofore issued or otherwise lawfully authorized, and the construction of which has been pursued in good faith within 180 days after the effective date of this code and has not been abandoned.


R103.3.3 Phased approval. The code official shall have the authority to issue a permit for the construction of part of an energy conservation system before the construction documents for the entire system have been submitted or approved, provided adequate information and detailed statements have been filed complying with all pertinent requirements of this code. The holders of such permit shall proceed at their own risk without assurance that the permit for the entire energy conservation system will be granted.


R103.4 Amended construction documents. Changes made during construction that are not in compliance with the approved construction documents shall be resubmitted for approval as an amended set of construction documents.


R103.5 Retention of construction documents. One set of approved construction documents shall be retained by the code official for a period of not less than 180 days from date of completion of the permitted work, or as required by state or local laws.

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NEW SECTION
WAC 51-11R-10400   Section R104 -- Inspections.  


R104.1 General. Construction work for which a permit is required shall be subject to inspection by the code official.


R104.2 Required approvals. Work shall not be done beyond the point indicated in each successive inspection without first obtaining the approval of the code official. The code official, upon notification, shall make the requested inspections and shall either indicate the portion of the construction that is satisfactory as completed, or notify the permit holder or his or her agent wherein the same fails to comply with this code. Any portions that do not comply shall be corrected and such portion shall not be covered or concealed until authorized by the code official.


R104.2.1 Wall insulation inspection. The building official, upon notification, shall make a wall insulation inspection in addition to those inspections required in Section R109 of the International Residential Code. This inspection shall be made after all wall and cavity insulation is in place and prior to cover.


R104.3 Final inspection. The building shall have a final inspection and not be occupied until approved.


R104.4 Reinspection. A building shall be reinspected when determined necessary by the code official.


R104.5 Approved inspection agencies. The code official is authorized to accept reports of approved inspection agencies, provided such agencies satisfy the requirements as to qualifications and reliability.


R104.6 Inspection requests. It shall be the duty of the holder of the permit or their duly authorized agent to notify the code official when work is ready for inspection. It shall be the duty of the permit holder to provide access to and means for inspections of such work that are required by this code.


R104.7 Reinspection and testing. Where any work or installation does not pass an initial test or inspection, the necessary corrections shall be made so as to achieve compliance with this code. The work or installation shall then be resubmitted to the code official for inspection and testing.


R104.8 Approval. After the prescribed tests and inspections indicate that the work complies in all respects with this code, a notice of approval shall be issued by the code official.


R104.8.1 Revocation. The code official is authorized to, in writing, suspend or revoke a notice of approval issued under the provisions of this code wherever the certificate is issued in error, or on the basis of incorrect information supplied, or where it is determined that the building or structure, premise, or portion thereof is in violation of any ordinance or regulation or any of the provisions of this code.

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NEW SECTION
WAC 51-11R-10500   Section R105 -- Validity.  


R105.1 General. If a portion of this code is held to be illegal or void, such a decision shall not affect the validity of the remainder of this code.

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NEW SECTION
WAC 51-11R-10600   Section R106 -- Referenced standards.  


R106.1 Referenced codes and standards. The codes and standards referenced in this code shall be those listed in Chapter 5, and such codes and standards shall be considered as part of the requirements of this code to the prescribed extent of each such reference and as further regulated in Sections R106.1.1 and R106.1.2.


R106.1.1 Conflicts. Where differences occur between provisions of this code and referenced codes and standards, the provisions of this code shall apply.


R106.1.2 Provisions in referenced codes and standards. Where the extent of the reference to a referenced code or standard includes subject matter that is within the scope of this code, the provisions of this code, as applicable, shall take precedence over the provisions in the referenced code or standard.


R106.2 Conflicting requirements. Where the provisions of this code and the referenced standards conflict, the provisions of this code shall take precedence.


R106.3 Application of references. References to chapter or section numbers, or to provisions not specifically identified by number, shall be construed to refer to such chapter, section or provision of this code.


R106.4 Other laws. The provisions of this code shall not be deemed to nullify any provisions of local, state or federal law. In addition to the requirements of this code, all occupancies shall conform to the provisions included in the state building code (chapter 19.27 RCW). In case of conflicts among codes enumerated in RCW 19.27.031 (1) through (4) and this code, an earlier named code shall govern over those following. In the case of conflict between the duct sealing and insulation requirements of this code and the duct insulation requirements of Sections 603 and 604 of the International Mechanical Code, the duct insulation requirements of this code shall govern.

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NEW SECTION
WAC 51-11R-10700   Section R107 -- Fees.  


R107.1 Fees. A permit shall not be issued until the fees prescribed in Section R107.2 have been paid, nor shall an amendment to a permit be released until the additional fee, if any, has been paid.


R107.2 Schedule of permit fees. A fee for each permit shall be paid as required, in accordance with the schedule as established by the applicable governing authority.


R107.3 Work commencing before permit issuance. Any person who commences any work before obtaining the necessary permits shall be subject to an additional fee established by the code official, which shall be in addition to the required permit fees.


R107.4 Related fees. The payment of the fee for the construction, alteration, removal or demolition of work done in connection to or concurrently with the work or activity authorized by a permit shall not relieve the applicant or holder of the permit from the payment of other fees that are prescribed by law.


R107.5 Refunds. The code official is authorized to establish a refund policy.

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NEW SECTION
WAC 51-11R-10800   Section R108 -- Stop work order.  


R108.1 Authority. Whenever the code official finds any work regulated by this code being performed in a manner either contrary to the provisions of this code or dangerous or unsafe, the code official is authorized to issue a stop work order.


R108.2 Issuance. The stop work order shall be in writing and shall be given to the owner of the property involved, or to the owner's agent, or to the person doing the work. Upon issuance of a stop work order, the cited work shall immediately cease. The stop work order shall state the reason for the order, and the conditions under which the cited work will be permitted to resume.


R108.3 Emergencies. Where an emergency exists, the code official shall not be required to give a written notice prior to stopping the work.


R108.4 Failure to comply. Any person who shall continue any work after having been served with a stop work order, except such work as that person is directed to perform to remove a violation or unsafe condition, shall be liable to a fine of not less than [AMOUNT] dollars or more than [AMOUNT] dollars.

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-10900   Section R109 -- Board of appeals.  


R109.1 General. In order to hear and decide appeals of orders, decisions or determinations made by the code official relative to the application and interpretation of this code, there shall be and is hereby created a board of appeals. The code official shall be an ex officio member of said board but shall have no vote on any matter before the board. The board of appeals shall be appointed by the governing body and shall hold office at its pleasure. The board shall adopt rules of procedure for conducting its business, and shall render all decisions and findings in writing to the appellant with a duplicate copy to the code official.


R109.2 Limitations on authority. An application for appeal shall be based on a claim that the true intent of this code or the rules legally adopted thereunder have been incorrectly interpreted, the provisions of this code do not fully apply or an equally good or better form of construction is proposed. The board shall have no authority to waive requirements of this code.


R109.3 Qualifications. The board of appeals shall consist of members who are qualified by experience and training and are not employees of the jurisdiction.

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NEW SECTION
WAC 51-11R-11000   Section R110 -- Violations.   It shall be unlawful for any person, firm, or corporation to erect or construct any building, or remodel or rehabilitate any existing building or structure in the state, or allow the same to be done, contrary to or in violation of any of the provisions of this code.

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NEW SECTION
WAC 51-11R-11100   Section R111 -- Liability.   Nothing contained in this code is intended to be nor shall be construed to create or form the basis for any liability on the part of any city or county or its officers, employees or agents for any injury or damage resulting from the failure of a building to conform to the provisions of this code.

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NEW SECTION
WAC 51-11R-20000   Chapter 2 [RE] -- Definitions.  

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-20100   Section R201 -- General.  


R201.1 Scope. Unless stated otherwise, the following words and terms in this code shall have the meanings indicated in this chapter.


R201.2 Interchangeability. Words used in the present tense include the future; words in the masculine gender include the feminine and neuter; the singular number includes the plural and the plural includes the singular.


R201.3 Terms defined in other codes. Terms that are not defined in this code but are defined in the International Building Code, International Fire Code, International Fuel Gas Code, International Mechanical Code, International Plumbing Code or the International Residential Code shall have the meanings ascribed to them in those codes.


R201.4 Terms not defined. Terms not defined by this chapter shall have ordinarily accepted meanings such as the context implies.

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NEW SECTION
WAC 51-11R-20200   Section R202 -- General definitions.  

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NEW SECTION
WAC 51-11R-20201   Section R202.1 -- A.  

ABOVE-GRADE WALL. A wall enclosing conditioned space that is not a below-grade wall. This includes between-floor spandrels, peripheral edges of floors, roof and basement knee walls, dormer walls, gable end walls, walls enclosing a mansard roof and skylight shafts.

ACCESSIBLE. Admitting close approach as a result of not being guarded by locked doors, elevation or other effective means (see "Readily accessible").

ADDITION. An extension or increase in the conditioned space floor area or height of a building or structure.

ADVANCED FRAMED WALLS. Studs framed on 24-inch centers with double top plate and single bottom plate. Corners use two studs or other means of fully insulating corners, and one stud is used to support each header. Headers consist of double 2x material with R-10 insulation between the header and exterior sheathing. Interior partition wall/exterior wall intersections are fully insulated in the exterior wall. (See Standard Framing and Appendix A, of this code.)

AIR BARRIER. Material(s) assembled and joined together to provide a barrier to air leakage through the building envelope. An air barrier may be a single material or a combination of materials.

ALTERATION. Any construction or renovation to an existing structure other than repair or addition that requires a permit. Also, a change in a mechanical system that involves an extension, addition or change to the arrangement, type or purpose of the original installation that requires a permit.

APPROVED. Approval by the code official as a result of investigation and tests conducted by him or her, or by reason of accepted principles or tests by nationally recognized organizations.

AUTOMATIC. Self-acting, operating by its own mechanism when actuated by some impersonal influence, as, for example, a change in current strength, pressure, temperature or mechanical configuration (see "Manual").

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NEW SECTION
WAC 51-11R-20202   Section R202.2 -- B.  

BASEMENT WALL. See above-grade wall and below-grade wall.

BELOW-GRADE WALL. That portion of a wall in the building envelope that is entirely below the finish grade and in contact with the ground.

BUILDING. Any structure used or intended for supporting or sheltering any use or occupancy, including any mechanical systems, service water heating systems and electric power and lighting systems located on the building site and supporting the building.

BUILDING SITE. A contiguous area of land that is under the ownership or control of one entity.

BUILDING THERMAL ENVELOPE. The below-grade walls, above-grade walls, floor, roof, and any other building elements that enclose conditioned space or provides a boundary between conditioned space and exempt or unconditioned space.

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NEW SECTION
WAC 51-11R-20203   Section R202.3 -- C.  

C-FACTOR (THERMAL CONDUCTANCE). The coefficient of heat transmission (surface to surface) through a building component or assembly, equal to the time rate of heat flow per unit area and the unit temperature difference between the warm side and cold side surfaces (Btu/h ft2 × F) [W/(m2 × K)].

CODE OFFICIAL. The officer or other designated authority charged with the administration and enforcement of this code, or a duly authorized representative.

COMMERCIAL BUILDING. For this code, all buildings that are not included in the definition of "Residential buildings."

CONDITIONED FLOOR AREA. The horizontal projection of the floors associated with the conditioned space.

CONDITIONED SPACE. An area or room within a building being heated or cooled, containing uninsulated ducts, or with a fixed opening directly into an adjacent conditioned space.

CONTINUOUS AIR BARRIER. A combination of materials and assemblies that restrict or prevent the passage of air through the building thermal envelope.

CONTINUOUS INSULATION (c.i.). Insulation that is continuous across all structural members without thermal bridges other than fasteners and service openings. It is installed on the interior or exterior or is integral to any opaque surface of the building envelope.

CURTAIN WALL. Fenestration products used to create an external nonload-bearing wall that is designed to separate the exterior and interior environments.

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-20204   Section R202.4 -- D.  

DEMAND RECIRCULATION WATER SYSTEM. A water distribution system where pump(s) prime the service hot water piping with heated water upon demand for hot water.

DUCT. A tube or conduit utilized for conveying air. The air passages of self-contained systems are not to be construed as air ducts.

DUCT SYSTEM. A continuous passageway for the transmission of air that, in addition to ducts, includes duct fittings, dampers, plenums, fans and accessory air-handling equipment and appliances.

DWELLING UNIT. A single unit providing complete independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation.

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NEW SECTION
WAC 51-11R-20205   Section R202.5 -- E.  

ENERGY ANALYSIS. A method for estimating the annual energy use of the proposed design and standard reference design based on estimates of energy use.

ENERGY COST. The total estimated annual cost for purchased energy for the building functions regulated by this code, including applicable demand charges.

ENERGY SIMULATION TOOL. An approved software program or calculation-based methodology that projects the annual energy use of a building.

ENTRANCE DOOR. Fenestration products used for ingress, egress and access in nonresidential buildings including, but not limited to, exterior entrances that utilize latching hardware and automatic closers and contain over 50 percent glass specifically designed to withstand heavy use and possibly abuse.

EXTERIOR WALL. Walls including both above-grade walls and below-grade walls.

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NEW SECTION
WAC 51-11R-20206   Section R202.6 -- F.  

FENESTRATION. Skylights, roof windows, vertical windows (fixed or moveable), opaque doors, glazed doors, glazed block and combination opaque/glazed doors. Fenestration includes products with glass and nonglass glazing materials.

FENESTRATION AREA. Total area of the fenestration measured using the rough opening, and including the glazing, sash and frame.

FENESTRATION PRODUCT, FIELD-FABRICATED. A fenestration product whose frame is made at the construction site of standard dimensional lumber or other materials that were not previously cut, or otherwise formed with the specific intention of being used to fabricate a fenestration product or exterior door. Field fabricated does not include site-built fenestration.

FENESTRATION PRODUCT, SITE-BUILT. A fenestration designed to be made up of field-glazed or field-assembled units using specific factory cut or otherwise factory-formed framing and glazing units. Examples of site-built fenestration include storefront systems, curtain walls, and atrium roof systems.

F-FACTOR. The perimeter heat loss factor for slab-on-grade floors (Btu/h × ft × F) [W/(m × K)].

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-20207   Section R202.7 -- G.  

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NEW SECTION
WAC 51-11R-20208   Section R202.8 -- H.  

HEATED SLAB-ON-GRADE FLOOR. Slab-on-grade floor construction in which the heating elements, hydronic tubing, or hot air distribution system is in contact with, or placed within or under, the slab.

HIGH-EFFICACY LAMPS. Compact fluorescent lamps, T-8 or smaller diameter linear fluorescent lamps, or lamps with a minimum efficacy of:

1. 60 lumens per watt for lamps over 40 watts;

2. 50 lumens per watt for lamps over 15 watts to 40 watts; and

3. 40 lumens per watt for lamps 15 watts or less.

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NEW SECTION
WAC 51-11R-20209   Section R202.9 -- I.  

INFILTRATION. The uncontrolled inward air leakage into a building caused by the pressure effects of wind or the effect of differences in the indoor and outdoor air density or both.

INSULATING SHEATHING. An insulating board with a core material having a minimum R-value of R-2.

INTEGRATED ENERGY EFFICIENCY RATIO (IEER). A single-number figure of merit expressing cooling part-load EER efficiency for unitary air-conditioning and heat pump equipment on the basis of weighted operation at various load capacities for the equipment.

INTERMEDIATE FRAMED WALLS. Studs framed on 16-inch centers with double top plate and single bottom plate. Corners use two studs or other means of fully insulating corners, and each opening is framed by two studs. Headers shall be insulated to R-10.

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NEW SECTION
WAC 51-11R-20210   Section R202.10 -- J.  

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NEW SECTION
WAC 51-11R-20211   Section 202.11 -- K.  

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NEW SECTION
WAC 51-11R-20212   Section R202.12 -- L.  

LABELED. Equipment, materials or products to which have been affixed a label, seal, symbol or other identifying mark of a nationally recognized testing laboratory, inspection agency or other organization concerned with product evaluation that maintains periodic inspection of the production of the above-labeled items and whose labeling indicates either that the equipment, material or product meets identified standards or has been tested and found suitable for a specified purpose.

LISTED. Equipment, materials, products or services included in a list published by an organization acceptable to the code official and concerned with evaluation of products or services that maintains periodic inspection of production of listed equipment or materials or periodic evaluation of services and whose listing states either that the equipment, material, product or service meets identified standards or has been tested and found suitable for a specified purpose.

LOW-VOLTAGE LIGHTING. A lighting system consisting of an isolating power supply, the low voltage luminaires, and associated equipment that are all identified for the use. The output circuits of the power supply are rated for not more than 25 amperes and operate at 30 volts (42.4 volts peak) or less under all load conditions.

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NEW SECTION
WAC 51-11R-20213   Section R202.13 -- M.  

MANUAL. Capable of being operated by personal intervention (see "Automatic").

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NEW SECTION
WAC 51-11R-20214   Section R202.14 -- N.  

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NEW SECTION
WAC 51-11R-20215   Section R202.15 -- O.  

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NEW SECTION
WAC 51-11R-20216   Section R202.16 -- P.  

PROPOSED DESIGN. A description of the proposed building used to estimate annual energy use for determining compliance based on total building performance.

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NEW SECTION
WAC 51-11R-20217   Section R202.17 -- Q.  

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NEW SECTION
WAC 51-11R-20218   Section R202.18 -- R.  

READILY ACCESSIBLE. Capable of being reached quickly for operation, renewal or inspection without requiring those to whom ready access is requisite to climb over or remove obstacles or to resort to portable ladders or access equipment (see "Accessible").

REPAIR. The reconstruction or renewal of any part of an existing building.

RESIDENTIAL BUILDING. For this code, includes detached one- and two-family dwellings and multiple single-family dwellings (townhouses) as well as Group R-2, R-3 and R-4 buildings three stories or less in height above grade plane.

ROOF ASSEMBLY. A system designed to provide weather protection and resistance to design loads. The system consists of a roof covering and roof deck or a single component serving as both the roof covering and the roof deck. A roof assembly includes the roof covering, underlayment, roof deck, insulation, vapor retarder and interior finish.

R-VALUE (THERMAL RESISTANCE). The inverse of the time rate of heat flow through a body from one of its bounding surfaces to the other surface for a unit temperature difference between the two surfaces, under steady state conditions, per unit area (h ft2 F/Btu) [(m2 K)/W].

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-20219   Section R202.19 -- S.  

SERVICE WATER HEATING. Supply of hot water for purposes other than comfort heating.

SKYLIGHT. Glass or other transparent or translucent glazing material installed at a slope of less than 60 degrees (1.05 rad) from horizontal. Glazing material in skylights, including unit skylights, solariums, sunrooms, roofs and sloped walls is included in this definition.

SLAB-ON-GRADE FLOOR. That portion of a slab floor of the building envelope that is in contact with the ground and that is either above grade or is less than or equal to 24 inches below the final elevation of the nearest exterior grade.

SMALL BUSINESS. Any business entity (including a sole proprietorship, corporation, partnership or other legal entity) which is owned and operated independently from all other businesses, which has the purpose of making a profit, and which has fifty or fewer employees.

SOLAR HEAT GAIN COEFFICIENT (SHGC). The ratio of the solar heat gain entering the space through the fenestration assembly to the incident solar radiation. Solar heat gain includes directly transmitted solar heat and absorbed solar radiation which is then reradiated, conducted or convected into the space.

STANDARD FRAMING. All framing practices not defined as "intermediate" or "advanced" shall be considered standard. (See Advanced Framed Wall, Intermediate Framed Wall).

STANDARD REFERENCE DESIGN. A version of the proposed design that meets the minimum requirements of this code and is used to determine the maximum annual energy use requirement for compliance based on total building performance.

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NEW SECTION
WAC 51-11R-20220   Section R202.20 -- T.  

THERMAL ISOLATION. Physical and space conditioning separation from conditioned space(s). The conditioned space(s) shall be controlled as separate zones for heating and cooling or conditioned by separate equipment.

THERMOSTAT. An automatic control device used to maintain temperature at a fixed or adjustable set point.

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NEW SECTION
WAC 51-11R-20221   Section R202.21 -- U.  

U-FACTOR (THERMAL TRANSMITTANCE). The coefficient of heat transmission (air to air) through a building component or assembly, equal to the time rate of heat flow per unit area and unit temperature difference between the warm side and cold side air films (Btu/h ft2 F) [W/(m2 K)].

UNHEATED SLAB-ON-GRADE FLOOR. A slab-on-grade floor that is not a heated slab-on-grade floor.

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-20222   Section R202.22 -- V.  

VENTILATION. The natural or mechanical process of supplying conditioned or unconditioned air to, or removing such air from, any space.

VENTILATION AIR. That portion of supply air that comes from outside (outdoors) plus any recirculated air that has been treated to maintain the desired quality of air within a designated space.

VERTICAL FENESTRATION. All fenestration other than skylights.

VISIBLE TRANSMITTANCE [VT]. The ratio of visible light entering the space through the fenestration product assembly to the incident visible light, visible transmittance, includes the effects of glazing material and frame and is expressed as a number between 0 and 1.

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-20223   Section R202.23 -- W.  

WHOLE HOUSE MECHANICAL VENTILATION SYSTEM. An exhaust system, supply system, or combination thereof that is designed to mechanically exchange indoor air with outdoor air when operating continuously or through a programmed intermittent schedule to satisfy the whole house ventilation rates.

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NEW SECTION
WAC 51-11R-20224   Section R202.24 -- XYZ.  

ZONE. A space or group of spaces within a building with heating or cooling requirements that are sufficiently similar so that desired conditions can be maintained throughout using a single controlling device.

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NEW SECTION
WAC 51-11R-30000   Chapter 3 [RE] -- General requirements.  

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-30100   Section R301 -- Climate zones.  


R301.1 General. Climate zones from Table R301.1 shall be used in determining the applicable requirements from Chapter 4. Locations not in Table R301.1 (outside the United States) shall be assigned a climate zone based on Section R301.3.


R301.2 Warm humid counties. Warm humid counties are identified in Table R301.1 by an asterisk.


R301.3 International climate zones. The climate zone for any location outside the United States shall be determined by applying Table R301.3(1) and then Table R301.3(2).


TABLE R301.1

CLIMATE ZONES, MOISTURE REGIMES, AND WARM-HUMID

DESIGNATIONS BY STATE AND COUNTY


Key: A - Moist, B - Dry, C - Marine. Absence of moisture designation indicates moisture regime is irrelevant. Asterisk (*) indicates a warm-humid location.
WASHINGTON
5B Adams 4C Grays Harbor 4C Pierce
5B Asotin 4C Island 4C San Juan
5B Benton 4C Jefferson 4C Skagit
5B Chelan 4C King 5B Skamania
4C Clallam 4C Kitsap 4C Snohomish
4C Clark 5B Kittitas 5B Spokane
5B Columbia 5B Klickitat 6B Stevens
4C Cowlitz 4C Lewis 4C Thurston
5B Douglas 5B Lincoln 4C Wahkiakum
6B Ferry 4C Mason 5B Walla Walla
5B Franklin 6B Okanogan 4C Whitcom
5B Garfield 4C Pacific 5B Whitman
5B Grant 6B Pend Oreille 5B Yakima

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NEW SECTION
WAC 51-11R-30200   Section R302 -- Design conditions.  


R302.1 Interior design conditions. The interior design temperatures used for heating and cooling load calculations shall be a maximum of 72F (22C) for heating and minimum of 75F (24C) for cooling.


R302.2 Exterior design conditions. The heating or cooling outdoor design temperatures shall be selected from Appendix C.

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NEW SECTION
WAC 51-11R-30300   Section R303 -- Materials, systems and equipment.  

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NEW SECTION
WAC 51-11R-30310   Section R303.1 -- Identification.  


R303.1 Identification. Materials, systems and equipment shall be identified in a manner that will allow a determination of compliance with the applicable provisions of this code.


R303.1.1 Building thermal envelope insulation. An R-value identification mark shall be applied by the manufacturer to each piece of building thermal envelope insulation 12 inches (305 mm) or greater in width. Alternately, the insulation installers shall provide a certification listing the type, manufacturer and R-value of insulation installed in each element of the building thermal envelope. For blown or sprayed insulation (fiberglass and cellulose), the initial installed thickness, settled thickness, settled R-value, installed density, coverage area and number of bags installed shall be listed on the certification. For sprayed polyurethane foam (SPF) insulation, the installed thickness of the areas covered and R-value of installed thickness shall be listed on the certification. The insulation installer shall sign, date and post the certification in a conspicuous location on the job site.


R303.1.1.1 Blown or sprayed roof/ceiling insulation. The thickness of blown-in or sprayed roof/ceiling insulation (fiberglass or cellulose) shall be written in inches (mm) on markers that are installed at least one for every 300 square feet (28 m2) throughout the attic space. The markers shall be affixed to the trusses or joists and marked with the minimum initial installed thickness with numbers a minimum of 1 inch (25 mm) in height. Each marker shall face the attic access opening. Spray polyurethane foam thickness and installed R-value shall be listed on certification provided by the insulation installer.


R303.1.2 Insulation mark installation. Insulating materials shall be installed such that the manufacturer's R-value mark is readily observable upon inspection.


R303.1.3 Fenestration product rating. U-factors of fenestration products (windows, doors and skylights) shall be determined in accordance with NFRC 100 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled U-factor shall be assigned a default U-factor from Table R303.1.3(1), R303.1.3(2) or R303.1.3(4). The solar heat gain coefficient (SHGC) and visible transmittance (VT) of glazed fenestration products (windows, glazed doors and skylights) shall be determined in accordance with NFRC 200 by an accredited, independent laboratory, and labeled and certified by the manufacturer. Products lacking such a labeled SHGC or VT shall be assigned a default SHGC or VT from Table R303.1.3(3).


EXCEPTION: Units without NFRC ratings produced by a small business may be assigned default U-factors from Table R303.1.3(5) for vertical fenestration.

R303.1.4 Insulation product rating. The thermal resistance (R-value) of insulation shall be determined in accordance with the U.S. Federal Trade Commission R-value rule (C.F.R. Title 16, Part 460) in units of h × ft2 × F/Btu at a mean temperature of 75F (24C).

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NEW SECTION
WAC 51-11R-30311   Table R303.1.3(1) -- Default glazed fenestration U-factor.  


TABLE R303.1.3(1)

DEFAULT GLAZED FENESTRATION U-FACTOR


FRAME TYPE SINGLE PANE DOUBLE PANE
Metal 1.20 0.80 SKYLIGHT
Metal with Thermal Break1 1.10 0.65 See Table R303.1.3(4)
Nonmetal or Metal Clad 0.95 0.55
Glazed Block 0.60

1 Metal Thermal Break = A metal thermal break framed window shall incorporate the following minimum design characteristics:
a) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/F;
b) The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and
c) All metal framing members of the products exposed to interior and exterior air shall incorporate a thermal break meeting the criteria in a) and b) above.

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NEW SECTION
WAC 51-11R-30312   Table R303.1.3(2) -- Default door U-factors.  


TABLE R303.1.3(2)

DEFAULT DOOR U-FACTORS


Door Type No

Glazed Fenestration

Single

Glazing

Double

Glazing

with 1/4 in.

Airspace

Double

Glazing

with 1/2

in.

Airspace

Double

Glazing

with

e = 0.10,

1/2 in.

Argon

SWINGING DOORS (Rough opening - 38 in. x 82 in.)
Slab Doors
Wood slab in wood framea 0.46
6% glazed fenestration (22 in. x 8 in. lite) - 0.48 0.47 0.46 0.44
25% glazed fenestration (22 in. x 36 in. lite) - 0.58 0.48 0.46 0.42
45% glazed fenestration (22 in. x 64 in. lite) - 0.69 0.49 0.46 0.39
More than 50% glazed fenestration Use Table R303.1.3(1)
Insulated steel slab with wood edge in wood framea 0.16
6% glazed fenestration (22 in. x 8 in. lite) - 0.21 0.20 0.19 0.18
25% glazed fenestration (22 in. x 36 in. lite) - 0.39 0.28 0.26 0.23
45% glazed fenestration (22 in. x 64 in. lite) - 0.58 0.38 0.35 0.26
More than 50% glazed fenestration Use Table R303.1.3(1)
Foam insulated steel slab with metal edge in steel frameb 0.37
6% glazed fenestration (22 in. x 8 in. lite) - 0.44 0.42 0.41 0.39
25% glazed fenestration (22 in. x 36 in. lite) - 0.55 0.50 0.48 0.44
45% glazed fenestration (22 in. x 64 in. lite) - 0.71 0.59 0.56 0.48
More than 50% glazed fenestration Use Table R303.1.3(1)
Cardboard honeycomb slab with metal edge in steel frameb 0.61
Style and Rail Doors
Sliding glass doors/French doors Use Table R303.1.3(1)
Site-Assembled Style and Rail Doors
Aluminum in aluminum frame - 1.32 0.99 0.93 0.79
Aluminum in aluminum frame with thermal break - 1.13 0.80 0.74 0.63

Note: Appendix A Tables A107.1(2) through A107.1(4) may also be used if applicable.
a Thermally broken sill (add 0.03 for nonthermally broken sill).
b Nonthermally broken sill.
c Nominal U-factors are through the center of the insulated panel before consideration of thermal bridges around the edges of the door section and due to the frame.

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NEW SECTION
WAC 51-11R-30313   Table R303.1.3(3) -- Default glazed fenestration SHGC and VT.  


TABLE R303.1.3(3)

DEFAULT GLAZED FENESTRATION SHGC AND VT


SINGLE GLAZED DOUBLE GLAZED GLAZED BLOCK
Clear Tinted Clear Tinted
SHGC 0.8 0.7 0.7 0.6 0.6
VT 0.6 0.3 0.6 0.3 0.6

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NEW SECTION
WAC 51-11R-30314   Table R303.1.3(4) -- Default U-factors for skylights.  


TABLE R303.1.3(4)

DEFAULT U-FACTORS FOR SKYLIGHTS


Frame Type
Aluminum Without Thermal Break Aluminum With Thermal Break Reinforced Vinyl/Aluminum-Clad Wood or Vinyl Wood or Vinyl-Clad Wood/Vinyl Without Reinforcing
Fenestration Type
Single Glazing
glass U-1.58 U-1.51 U-1.40 U-1.18
acrylic/polycarb U-1.52 U-1.45 U-1.34 U-1.11
Double Glazing
air U-1.05 U-0.89 U-0.84 U-0.67
argon U-1.02 U-0.86 U-0.80 U-0.64
Double Glazing, e = 0.20
air U-0.96 U-0.80 U-0.75 U-0.59
argon U-0.91 U-0.75 U-0.70 U-0.54
Double Glazing, e = 0.10
air U-0.94 U-0.79 U-0.74 U-0.58
argon U-0.89 U-0.73 U-0.68 U-0.52
Double Glazing, e = 0.05
air U-0.93 U-0.78 U-0.73 U-0.56
argon U-0.87 U-0.71 U-0.66 U-0.50
Triple Glazing
air U-0.90 U-0.70 U-0.67 U-0.51
argon U-0.87 U-0.69 U-0.64 U-0.48
Triple Glazing, e = 0.20
air U-0.86 U-0.68 U-0.63 U-0.47
argon U-0.82 U-0.63 U-0.59 U-0.43
Triple Glazing, e = 0.20 on 2 surfaces
air U-0.82 U-0.64 U-0.60 U-0.44
argon U-0.79 U-0.60 U-0.56 U-0.40
Triple Glazing, e = 0.10 on 2 surfaces
air U-0.81 U-0.62 U-0.58 U-0.42
argon U-0.77 U-0.58 U-0.54 U-0.38
Quadruple Glazing, e = 0.10 on 2 surfaces
air U-0.78 U-0.59 U-0.55 U-0.39
argon U-0.74 U-0.56 U-0.52 U-0.36
krypton U-0.70 U-0.52 U-0.48 U-0.32

1. U-factors are applicable to both glass and plastic, flat and domed units, all spacers and gaps.
2. Emissivities shall be less than or equal to the value specified.
3. Gap fill shall be assumed to be air unless there is a minimum of 90% argon or krypton.
4. Aluminum frame with thermal break is as defined in footnote 1 to Table R303.1.3(1).

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NEW SECTION
WAC 51-11R-30315   Table R303.1.3(5) -- Small business compliance default table.  


TABLE R303.1.3(5)

SMALL BUSINESS COMPLIANCE TABLE

DEFAULT U-FACTORS FOR VERTICAL FENESTRATION


Vertical Fenestration Description Frame Type
Any Frame Aluminum Thermal Break2 Wood/Vinyl/

Fiberglass

Panes Low-e1 Spacer Fill
Double3 A Any Argon 0.48 0.41 0.32
B Any Argon 0.46 0.39 0.30
C Any Argon 0.44 0.37 0.28
C High Performance Argon 0.42 0.35 Deemed to comply5
Triple4 A Any Air 0.50 0.44 0.26
B Any Air 0.45 0.39 0.22
C Any Air 0.41 0.34 0.20
Any double low-e Any Air 0.35 0.32 0.18

1 Low-eA (emissivity) shall be 0.24 to 0.16.
Low-eB (emissivity) shall be 0.15 to 0.08.
Low-eC (emissivity) shall be 0.07 or less.
2 Aluminum Thermal Break = An aluminum thermal break framed window shall incorporate the following minimum design characteristics:
a) The thermal conductivity of the thermal break material shall be not more than 3.6 Btu-in/h/ft2/F;
b) The thermal break material must produce a gap in the frame material of not less than 0.210 inches; and
c) All metal framing members of the products exposed to interior and exterior air shall incorporate a thermal break meeting the criteria in a and b above.
3 A minimum air space of 0.375 inches between panes of glass is required for double glazing.
4 A minimum air space of 0.25 inches between panes of glass is required for triple glazing.
5 Deemed to comply glazing shall not be used for performance compliance.

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NEW SECTION
WAC 51-11R-30320   Section R303.2 -- Installation.  


R303.2 Installation. All materials, systems and equipment shall be installed in accordance with the manufacturer's installation instructions and the International Building Code or International Residential Code, as applicable.


R303.2.1 Protection of exposed foundation insulation. Insulation applied to the exterior of basement walls, crawlspace walls and the perimeter of slab-on-grade floors shall have a rigid, opaque and weather-resistant protective covering to prevent the degradation of the insulation's thermal performance. The protective covering shall cover the exposed exterior insulation and extend a minimum of 6 inches (153 mm) below grade.

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NEW SECTION
WAC 51-11R-30330   Section R303.3 -- Maintenance information.  


R303.3 Maintenance information. Maintenance instructions shall be furnished for equipment and systems that require preventive maintenance. Required regular maintenance actions shall be clearly stated and incorporated on a readily accessible label. The label shall include the title or publication number for the operation and maintenance manual for that particular model and type of product.

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NEW SECTION
WAC 51-11R-40000   Chapter 4 [RE] -- Residential energy efficiency.  

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Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency and appear in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 51-11R-40100   Section R401 -- General.  


R401.1 Scope. This chapter applies to residential buildings.


R401.2 Compliance. Projects shall comply with sections identified as "mandatory" and with either sections identified as "prescriptive" or the performance approach in Section R405. In addition, one- and two-family dwellings and townhouses, as defined in Section 101.2 of the International Residential Code shall comply with Section R406.


R401.3 Certificate (Mandatory). A permanent certificate shall be completed and posted on or within three feet of the electrical distribution panel by the builder or registered design professional. The certificate shall be completed by the builder or registered design professional and shall not cover or obstruct the visibility of the circuit directory label, service disconnect label or other required labels. The certificate shall list the predominant R-values of insulation installed in or on ceiling/roof, walls, foundation (slab, below-grade wall, crawlspace wall and/or floor) and ducts outside conditioned spaces; U-factors for fenestration and the solar heat gain coefficient (SHGC) of fenestration, and the results from any required duct system and building envelope air leakage testing done on the building. Where there is more than one value for each component, the certificate shall list the value covering the largest area. The certificate shall list the types and efficiencies of heating, cooling and service water heating equipment. Where a gas-fired unvented room heater, electric furnace, or baseboard electric heater is installed in the residence, the certificate shall list "gas-fired unvented room heater," "electric furnace" or "baseboard electric heater," as appropriate. An efficiency shall not be listed for gas-fired unvented room heaters, electric furnaces or electric baseboard heaters.

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NEW SECTION
WAC 51-11R-40200   Section R402 -- Building thermal envelope.  

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NEW SECTION
WAC 51-11R-40210   Section R402.1 -- General.  


R402.1 General (Prescriptive). The building thermal envelope shall meet the requirements of Sections R402.1.1 through R402.1.4.


R402.1.1 Insulation and fenestration criteria. The building thermal envelope shall meet the requirements of Table R402.1.1 based on the climate zone specified in Chapter 3.


R402.1.2 R-value computation. Insulation material used in layers, such as framing cavity insulation and insulating sheathing, shall be summed to compute the component R-value. The manufacturer's settled R-value shall be used for blown insulation. Computed R-values shall not include an R-value for other building materials or air films.


R402.1.3 U-factor alternative. An assembly with a U-factor equal to or less than that specified in Table R402.1.3 shall be permitted as an alternative to the R-value in Table R402.1.1.


R402.1.4 Total UA alternative. If the total building thermal envelope UA (sum of U-factor times assembly area) is less than or equal to the total UA resulting from using the U-factors in Table R402.1.3 (multiplied by the same assembly area as in the proposed building), the building shall be considered in compliance with Table R402.1.1. The U-factors for typical construction assemblies are included in Appendix A in chapter 51-11C WAC. These values shall be used for all calculations. Where proposed construction assemblies are not represented in Appendix A, values shall be calculated in accordance with the ASHRAE Handbook of Fundamentals using the framing factors listed in Appendix A where applicable and shall include the thermal bridging effects of framing materials. The SHGC requirements shall be met in addition to UA compliance. When using REScheck, the U-factors calculated by the software based on component R-value descriptions are acceptable. For the base building UA calculation, the maximum glazing area is 15% of the floor area.

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NEW SECTION
WAC 51-11R-40211   Table R402.1.1 -- Insulation and fenestration requirements by component.  


TABLE R402.1.1

INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENTa


Climate Zone Fenestration

U-Factorb

Skylightb

U-Factor

Glazed Fenestration SHGCb, e Ceiling

R-Value

Wood Frame Wallg, k, l

R-Value

Mass Wall

R-Valuei

Floor

R-Value

Below-

Gradec, k Wall R-Value

Slabd

R-Value & Depth

1 NR 0.75 0.25 30 13 3/4 13 0 0
2 0.40 0.65 0.25 38 13 4/6 13 0 0
3 0.35 0.55 0.25 38 20 or 13+5h 8/13 19 5/13f 0
4 except Marine 0.35 0.55 0.40 49 20 or 13+5h 8/13 19 10/13 10, 2 ft
5 and Marine 4 0.30 0.50 NR 49 21 int 21/ 21h 30g 10/15/

21int+TB

10, 2 ft
6 0.30 0.50 NR 49 21+5ci 21+5h 30g 10/15/

21int+TB

10, 4 ft
7 and 8 0.32 0.55 NR 49 20+5 or 13+10h 19/21 38g 15/19 10, 4 ft

For SI: 1 foot = 304.8 mm, ci = continuous insulation, int = intermediate framing.
a R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity which is less than the label or design thickness of the insulation, the compressed R-value of the insulation from Appendix Table A101.4 shall not be less than the R-value specified in the table.
b The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration. Exception: Skylights may be excluded from glazed fenestration SHGC requirements in Climate Zones 1 through 3 where the SHGC for such skylights does not exceed 0.30.
c "10/15/21+TB" means R-10 continuous insulation on the exterior of the wall, or R-15 on the continuous insulation on the interior of the wall, or R-21 cavity insulation plus a thermal break between the slab and the basement wall at the interior of the basement wall. "10/15/21+TB" shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the wall. "10/13" means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity insulation at the interior of the basement wall. "TB" means thermal break between floor slab and basement wall.
d R-10 continuous insulation is required under heated slab on grade floors. See R402.2.9.1.
e There are no SHGC requirements in the Marine Zone.
f Basement wall insulation is not required in warm-humid locations as defined by Figure R301.1 and Table R301.1.
g Reserved.
h First value is cavity insulation, second is continuous insulation or insulated siding, so "13+5" means R-13 cavity insulation plus R-5 continuous insulation or insulated siding. If structural sheathing covers 40 percent or less of the exterior, continuous insulation R-value shall be permitted to be reduced by no more than R-3 in the locations where structural sheathing is used to maintain a consistent total sheathing thickness.
i The second R-value applies when more than half the insulation is on the interior of the mass wall.
j For single rafter- or joist-vaulted ceilings, the insulation may be reduced to R-38.
k Int. (intermediate framing) denotes standard framing 16 inches on center with headers insulated with a minimum of R-10 insulation.
l Log and solid timber walls with a minimum average thickness of 3.5 inches are exempt from this insulation requirement.

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NEW SECTION
WAC 51-11R-40213   Table R402.1.3 -- Equivalent U-factors.  


TABLE R402.1.3

EQUIVALENT U-FACTORSa


Climate Zone Fenestration

U-Factor

Skylight

U-Factor

Ceiling

U-Factor

Frame Wall

U-Factor

Mass Wall

U-Factorb

Floor

U-Factor

Below-

Grade Wall U-Factor

1 0.50 0.75 0.035 0.082 0.197 0.064 0.360
2 0.40 0.65 0.030 0.082 0.165 0.064 0.360
3 0.35 0.55 0.030 0.057 0.098 0.047 0.091c
4 except Marine 0.35 0.55 0.026 0.057 0.098 0.047 0.059
5 and Marine 4 0.30 0.50 0.026 0.056 0.056 0.029 0.042
6 0.30 0.50 0.026 0.044 0.044 0.029 0.042
7 and 8 0.32 0.55 0.026 0.048 0.057 0.028 0.050

a Nonfenestration U-factors shall be obtained from measurement, calculation or an approved source or as specified in Section R402.1.3.
b Reserved.
c Basement wall U-factor of 0.360 in warm-humid locations as defined by Figure R301.1 and Table R301.1.

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NEW SECTION
WAC 51-11R-40220   Section R402.2 -- Specific insulation requirements.  


R402.2 Specific insulation requirements (Prescriptive). In addition to the requirements of Section R402.1, insulation shall meet the specific requirements of Sections R402.2.1 through R402.2.12.


R402.2.1 Ceilings with attic spaces. When Section R402.1.1 would require R-38 in the ceiling, R-30 shall be deemed to satisfy the requirement for R-38 wherever the full height of uncompressed R-30 insulation extends over the wall top plate at the eaves. Similarly, R-38 shall be deemed to satisfy the requirement for R-49 wherever the full height of uncompressed R-38 insulation extends over the wall top plate at the eaves. This reduction shall not apply to the U-factor alternative approach in Section R402.1.3 and the total UA alternative in Section R402.1.4.


R402.2.1.1 Loose insulation in attic spaces. Open-blown or poured loose fill insulation may be used in attic spaces where the slope of the ceiling is not more than 3 feet in 12 and there is at least 30 inches of clear distance from the top of the bottom chord of the truss or ceiling joist to the underside of the sheathing at the roof ridge.


R402.2.3 Eave baffle. For air permeable insulations in vented attics, a baffle shall be installed adjacent to soffit and eave vents. Baffles shall maintain an opening equal or greater than the size of the vent. The baffle shall extend over the top of the attic insulation. The baffle shall be permitted to be any solid material.


R402.2.4 Access hatches and doors. Access doors from conditioned spaces to unconditioned spaces (e.g., attics and crawl spaces) shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces. Access shall be provided to all equipment that prevents damaging or compressing the insulation. A wood framed or equivalent baffle or retainer is required to be provided when loose fill insulation is installed, the purpose of which is to prevent the loose fill insulation from spilling into the living space when the attic access is opened, and to provide a permanent means of maintaining the installed R-value of the loose fill insulation.


R402.2.5 Mass walls. Mass walls for the purposes of this chapter shall be considered above-grade walls of concrete block, concrete, insulated concrete form (ICF), masonry cavity, brick (other than brick veneer), earth (adobe, compressed earth block, rammed earth) and solid timber/logs.


R402.2.6 Steel-frame ceilings, walls, and floors. Steel-frame ceilings, walls, and floors shall meet the U-factor requirements of Table R402.1.3.


R402.2.7 Floors. Floor insulation shall be installed to maintain permanent contact with the underside of the subfloor decking. Insulation supports shall be installed so spacing is no more than 24-inches on center. Foundation vents shall be placed so that the top of the vent is below the lower surface of the floor insulation.


EXCEPTIONS: 1. When foundation vents are not placed so that the top of the vent is below the lower surface of the floor insulation, a permanently attached baffle shall be installed at an angle of 30 from horizontal, to divert air flow below the lower surface of the floor insulation.
2. Substantial contact with the surface being insulated is not required in enclosed floor/ceiling assemblies containing ducts where full R-value insulation is installed between the duct and the exterior surface.

R402.2.8 Basement walls. Below-grade exterior wall insulation used on the exterior (cold) side of the wall shall extend from the top of the below-grade wall to the top of the footing and shall be approved for below-grade use. Above-grade insulation shall be protected. Insulation used on the interior (warm) side of the wall shall extend from the top of the below-grade wall to the below-grade floor level and shall include R-5 rigid board providing a thermal break between the concrete wall and the slab.


R402.2.9 Slab-on-grade floors. The minimum thermal resistance (R-value) of the insulation around the perimeter of unheated or heated slab-on-grade floors shall be as specified in Table C402.1.1. The insulation shall be placed on the outside of the foundation or on the inside of the foundation wall. The insulation shall extend downward from the top of the slab for a minimum distance as shown in the table or to the top of the footing, whichever is less, or downward to at least the bottom of the slab and then horizontally to the interior or exterior for the total distance shown in the table. A two-inch by two-inch (maximum) pressure treated nailer may be placed at the finished floor elevation for attachment of interior finish materials. Insulation extending away from the building shall be protected by pavement or by a minimum of 10 inches (254 mm) of soil.


R402.2.9.1 Heated slab-on-grade floors (Mandatory). The entire area of a heated slab-on-grade floor shall be thermally isolated from the soil with a minimum of R-10 insulation. The insulation shall be an approved product for its intended use. If a soil gas control system is present below the heated slab-on-grade floor, which results in increased convective flow below the heated slab-on-grade floor, the heated slab-on-grade floor shall be thermally isolated from the sub-slab gravel layer. R-10 heated slab-on-grade floor insulation is required for all compliance paths.


R402.2.10 Reserved.


R402.2.11 Masonry veneer. Insulation shall not be required on the horizontal portion of the foundation that supports a masonry veneer.

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NEW SECTION
WAC 51-11R-40230   Section R402.3 -- Fenestration.  


R402.3 Fenestration (Prescriptive). In addition to the requirements of Section R402, fenestration shall comply with Sections R402.3.1 through R402.3.6.


R402.3.1 U-factor. An area-weighted average of fenestration products shall be permitted to satisfy the U-factor requirements.


R402.3.2 Glazed fenestration SHGC. An area-weighted average of fenestration products more than 50 percent glazed shall be permitted to satisfy the SHGC requirements.


R402.3.3 Glazed fenestration exemption. Up to 15 square feet (1.4 m2) of glazed fenestration per dwelling unit shall be permitted to be exempt from U-factor and SHGC requirements in Section R402.1.1. This exemption shall not apply to the U-factor alternative approach in Section R402.1.3 and the total UA alternative in Section R402.1.4.


R402.3.4 Opaque door exemption. One side-hinged opaque door assembly up to 24 square feet (2.22 m2) in area is exempted from the U-factor requirement in Section R402.1.1. This exemption shall not apply to the U-factor alternative approach in Section R402.1.3 and the total UA alternative in Section R402.1.4.


R402.3.5 Reserved.


R402.3.6 Replacement fenestration. Where some or all of an existing fenestration unit is replaced with a new fenestration product, including sash and glazing, the replacement fenestration unit shall meet the applicable requirements for U-factor and SHGC in Table R402.1.1.

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NEW SECTION
WAC 51-11R-40240   Section R402.4 -- Air leakage.  


R402.4 Air leakage (Mandatory). The building thermal envelope shall be constructed to limit air leakage in accordance with the requirements of Sections R402.4.1 through R402.4.4.


R402.4.1 Building thermal envelope. The building thermal envelope shall comply with Sections R402.4.1.1 and R402.4.1.2. The sealing methods between dissimilar materials shall allow for differential expansion and contraction.


R402.4.1.1 Installation. The components of the building thermal envelope as listed in Table R402.4.1.1 shall be installed in accordance with the manufacturer's instructions and the criteria listed in Table R402.4.1.1, as applicable to the method of construction. Where required by the code official, an approved third party shall inspect all components and verify compliance.


R402.4.1.2 Testing. The building or dwelling unit shall be tested and verified as having an air leakage rate of not exceeding 5 air changes per hour in Climate Zones 1 and 2, and 5 air changes per hour in Climate Zones 3 through 8. Testing shall be conducted with a blower door at a pressure of 0.2 inches w.g. (50 Pascals). Where required by the code official, testing shall be conducted by an approved third party. A written report of the results of the test shall be signed by the party conducting the test and provided to the code official. Testing shall be performed at any time after creation of all penetrations of the building thermal envelope. Once visual inspection has confirmed the presence of a gasket (see Section 502.4), operable windows and doors manufactured by small business shall be permitted to be sealed off at the frame prior to the test.


During testing:

1. Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed, beyond the intended weatherstripping or other infiltration control measures;

2. Dampers including exhaust, intake, makeup air, backdraft and flue dampers shall be closed, but not sealed beyond intended infiltration control measures;

3. Interior doors, if installed at the time of the test, shall be open, access hatches to conditioned crawl spaces and conditioned attics shall be open;

4. Exterior openings for continuous ventilation systems and heat recovery ventilators shall be closed and sealed;

5. Heating and cooling systems, if installed at the time of the test, shall be turned off; and

6. Supply and return registers, if installed at the time of the test, shall be fully open.


R402.4.2 Fireplaces. New wood-burning fireplaces shall have tight-fitting flue dampers and outdoor combustion air.


R402.4.3 Air leakage of fenestration. Windows, skylights and sliding glass doors shall have an air infiltration rate of no more than 0.3 cfm per square foot (1.5 L/s/m2), and swinging doors no more than 0.5 cfm per square foot (2.6 L/s/m2), when tested according to NFRC 400 or AAMA/WDMA/CSA 101/I.S.2/A440 by an accredited, independent laboratory and listed and labeled by the manufacturer.


EXCEPTIONS: 1. Field-fabricated fenestration products (windows, skylights and doors).
2. Custom exterior fenestration products manufactured by a small business provided they meet the applicable provisions of Chapter 24 of the International Building Code.
3. Custom exterior windows and doors manufactured by a small business provided they meet the applicable provisions of chapter 24 of the International Building Code. Once visual inspection has confirmed the presence of a gasket, operable windows and doors manufactured by small business shall be permitted to be sealed off at the frame prior to the test.

R402.4.4 Recessed lighting. Recessed luminaires installed in the building thermal envelope shall be Type IC-rated and certified under ASTM E283 as having an air leakage rate not more than 2.0 cfm (0.944 L/s) when tested at a 1.57 psf (75 Pa) pressure differential and shall have a label attached showing compliance with this test method. All recessed luminaires shall be sealed with a gasket or caulk between the housing and the interior wall or ceiling covering.

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NEW SECTION
WAC 51-11R-40241   Table R402.4.1.1 -- Air barrier and insulation installation.  


TABLE R402.4.1.1

AIR BARRIER AND INSULATION INSTALLATION


COMPONENT CRITERIAa
Air barrier and thermal barrier A continuous air barrier shall be installed in the building envelope. Exterior thermal envelope contains a continuous air barrier. Breaks or joints in the air barrier shall be sealed. Air-permeable insulation shall not be used as a sealing material.
Cavity insulation installation All cavities in the thermal envelope shall be filled with insulation. The density of the insulation shall be at the manufacturers' product recommendation and said density shall be maintained for all volume of each cavity. Batt type insulation will show no voids or gaps and maintain an even density for the entire cavity. Batt insulation shall be installed in the recommended cavity depth. Where an obstruction in the cavity due to services, blocking, bracing or other obstruction exists, the batt product will be cut to fit the remaining depth of the cavity. Where the batt is cut around obstructions, loose fill insulation shall be placed to fill any surface or concealed voids, and at the manufacturers' specified density. Where faced batt is used, the installation tabs must be stapled to the face of the stud. There shall be no compression to the batt at the edges of the cavity due to inset stapling installation tabs.

Insulation that upon installation readily conforms to available space shall be installed filling the entire cavity and within the manufacturers' density recommendation.

Ceiling/attic The air barrier in any dropped ceiling/soffit shall be aligned with the insulation and any gaps in the air barrier sealed. Access openings, drop down stair or knee wall doors to unconditioned attic spaces shall be sealed. Batt insulation installed in attic roof assemblies may be compressed at exterior wall lines to allow for required attic ventilation.
Walls Corners and headers shall be insulated and the junction of the foundation and sill plate shall be sealed. The junction of the top plate and top of exterior walls shall be sealed. Exterior thermal envelope insulation for framed walls shall be installed in substantial contact and continuous alignment with the air barrier. Knee walls shall be sealed.
Windows, skylights and doors The space between window/door jambs and framing and skylights and framing shall be sealed.
Rim joists Rim joists shall be insulated and include the air barrier.
Floors (including above-garage and cantilevered floors) Insulation shall be installed to maintain permanent contact with underside of subfloor decking. The air barrier shall be installed at any exposed edge of insulation.
Crawl space walls Where provided in lieu of floor insulation, insulation shall be permanently attached to the crawlspace walls. Exposed earth in unvented crawl spaces shall be covered with a Class I vapor retarder with overlapping joints taped.
Shafts, penetrations Duct shafts, utility penetrations, and flue shafts opening to exterior or unconditioned space shall be sealed.
Narrow cavities Batts in narrow cavities shall be cut to fit, or narrow cavities shall be filled by insulation that on installation readily conforms to the available cavity space. Batts in narrow cavities shall be cut to fit and installed to the correct density without any voids or gaps or compression. Narrow cavities shall be filled by insulation that on installation readily conforms to the available cavity space.
Garage separation Air sealing shall be provided between the garage and conditioned spaces.
Recessed lighting Recessed light fixtures installed in the building thermal envelope shall be air tight, IC rated, and sealed to the drywall.
Plumbing and wiring Batt insulation shall be cut neatly to fit around wiring and plumbing in exterior walls. There shall be no voids or gaps or compression where cut to fit. Insulation that on installation readily conforms to available space shall extend behind piping and wiring.
Shower/tub on exterior wall Exterior walls adjacent to showers and tubs shall be insulated and the air barrier installed separating them from the showers and tubs.
Electrical/phone box on exterior walls The air barrier shall be installed behind electrical or communication boxes or air sealed boxes shall be installed.
HVAC register boots HVAC register boots that penetrate building thermal envelope shall be sealed to the subfloor or drywall.
Fireplace An air barrier shall be installed on fireplace walls. Fireplaces shall have gasketed doors.

a In addition, inspection of log walls shall be in accordance with the provisions of ICC-400.

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NEW SECTION
WAC 51-11R-40250   Section R402.5 -- Maximum fenestration U-factor and SHGC.  


R402.5 Maximum fenestration U-factor and SHGC (Mandatory). The area-weighted average maximum fenestration U-factor permitted using tradeoffs from Section R402.1.4 or R405 shall be 0.48 in Climate Zones 4 and 5 and 0.40 in Climate Zones 6 through 8 for vertical fenestration, and 0.75 in Climate Zones 4 through 8 for skylights. The area-weighted average maximum fenestration SHGC permitted using tradeoffs from Section R405 in Climate Zones 1 through 3 shall be 0.50.

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NEW SECTION
WAC 51-11R-40300   Section R403 -- Systems.  

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NEW SECTION
WAC 51-11R-40310   Section R403.1 -- Controls.  


R403.1 Controls (Mandatory). At least one thermostat shall be provided for each separate heating and cooling system.


R403.1.1 Programmable thermostat. Where the primary heating system is a forced-air furnace, at least one thermostat per dwelling unit shall be capable of controlling the heating and cooling system on a daily schedule to maintain different temperature set points at different times of the day. The thermostat shall allow for, at a minimum, a 5-2 programmable schedule (weekdays/weekends) and be capable of providing at least two programmable setback periods per day. This thermostat shall include the capability to set back or temporarily operate the system to maintain zone temperatures down to 55F (13C) or up to 85F (29C). The thermostat shall initially be programmed with a heating temperature set point no higher than 70F (21C) and a cooling temperature set point no lower than 78F (26C). The thermostat and/or control system shall have an adjustable deadband of not less than 10F.


EXCEPTIONS: 1. Systems controlled by an occupant sensor that is capable of shutting the system off when no occupant is sensed for a period of up to 30 minutes.
2. Systems controlled solely by a manually operated timer capable of operating the system for no more than two hours.

R403.1.2 Heat pump supplementary heat (Mandatory). Unitary air cooled heat pumps shall include controls that minimize supplemental heat usage during start-up, set-up, and defrost conditions. These controls shall anticipate need for heat and use compression heating as the first stage of heat. Controls shall indicate when supplemental heating is being used through visual means (e.g., LED indicators). Heat pumps equipped with supplementary heaters shall be installed with controls that prevent supplemental heater operation above 40F. At final inspection the auxiliary heat lock out control shall be set to 35F or less.

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NEW SECTION
WAC 51-11R-40320   Section R403.2 -- Ducts.  


R403.2 Ducts. Ducts and air handlers shall be in accordance with Sections R403.2.1 through R403.2.3.


R403.2.1 Insulation (Prescriptive). Ducts shall be insulated to a minimum of R-8.


EXCEPTION: Ducts or portions thereof located completely inside the building thermal envelope. Ducts located in crawl spaces do not qualify for this exception.

R403.2.2 Sealing (Mandatory). Ducts, air handlers, and filter boxes shall be sealed. Joints and seams shall comply with either the International Mechanical Code or International Residential Code, as applicable.


EXCEPTIONS: 1. Air-impermeable spray foam products shall be permitted to be applied without additional joint seals.
2. Where a duct connection is made that is partially inaccessible, three screws or rivets shall be equally spaced on the exposed portion of the joint so as to prevent a hinge effect.
3. Continuously welded and locking-type longitudinal joints and seams in ducts operating at static pressures less than 2 inches of water column (500 Pa) pressure classification shall not require additional closure systems.

Ducts shall be leak tested in accordance with WSU RS-33, using the maximum duct leakage rates specified. Duct tightness shall be verified by either of the following:

1. Postconstruction test: Total leakage shall be less than or equal to 4 cfm (113.3 L/min) per 100 square feet (9.29 m2) of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the entire system, including the manufacturer's air handler enclosure. All register boots shall be taped or otherwise sealed during the test. Leakage to outdoors shall be less than or equal to 4 cfm (133.3 L/min) per 100 square feet of conditioned floor area.

2. Rough-in test: Total leakage shall be less than or equal to 4 cfm (113.3 L/min) per 100 square feet (9.29 m2) of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the system, including the manufacturer's air handler enclosure. All registers shall be taped or otherwise sealed during the test. If the air handler is not installed at the time of the test, total leakage shall be less than or equal to 3 cfm (85 L/min) per 100 square feet (9.29 m2) of conditioned floor area.


EXCEPTION: The total leakage test is not required for ducts and air handlers located entirely within the building thermal envelope. Ducts located in crawl spaces do not qualify for this exception.

R403.2.2.1 Sealed air handler. Air handlers shall have a manufacturer's designation for an air leakage of no more than 2 percent of the design air flow rate when tested in accordance with ASHRAE 193.


R403.2.3 Building cavities (Mandatory). Building framing cavities shall not be used as ducts or plenums. Installation of ducts in exterior walls, floors or ceilings shall not displace required envelope insulation.

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NEW SECTION
WAC 51-11R-40330   Section R403.3 -- Mechanical system piping insulation.  


R403.3 Mechanical system piping insulation (Mandatory). Mechanical system piping capable of carrying fluids above 105F (41C) or below 55F (13C) shall be insulated to a minimum of R-6.


R403.3.1 Protection of piping insulation. Piping insulation exposed to weather shall be protected from damage, including that caused by sunlight, moisture, equipment maintenance, and wind, and shall provide shielding from solar radiation that can cause degradation of the material. Adhesive tape shall not be permitted.

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NEW SECTION
WAC 51-11R-40340   Section R403.4 -- Service hot water systems.  


R403.4 Service hot water systems. Energy conservation measures for service hot water systems shall be in accordance with Sections R403.4.1 and R403.4.2.


R403.4.1 Circulating hot water systems (Mandatory). Circulating hot water systems shall be provided with an automatic or readily accessible manual switch that can turn off the hot water circulating pump when the system is not in use.


R403.4.2 Hot water pipe insulation (Prescriptive). Insulation for hot water pipe shall have a minimum thermal resistance (R-value) of R-4.


403.4.3 Electric water heater insulation. All electric water heaters in unheated spaces or on concrete floors shall be placed on an incompressible, insulated surface with a minimum thermal resistance of R-10.

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NEW SECTION
WAC 51-11R-40350   Section R403.5 -- Mechanical ventilation.  


R403.5 Mechanical ventilation (Mandatory). The building shall be provided with ventilation that meets the requirements of the International Residential Code or International Mechanical Code, as applicable, or with other approved means of ventilation. Outdoor air intakes and exhausts shall have automatic or gravity dampers that close when the ventilation system is not operating.


R403.5.1 Whole-house mechanical ventilation system fan efficacy. Mechanical ventilation system fans shall meet the efficacy requirements of Table R403.5.1.


EXCEPTION: Where mechanical ventilation fans are integral to tested and listed HVAC equipment, they shall be powered by an electronically commutated motor.

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NEW SECTION
WAC 51-11R-40351   Table R403.5.1 -- Mechanical ventilation system fan efficacy.  


TABLE R403.5.1

MECHANICAL VENTILATION SYSTEM FAN EFFICACY


Fan Location Air Flow Rate Minimum (cfm) Minimum Efficacy (cfm/watt) Air Flow Rate Maximum (cfm)
Range hoods Any 2.8 cfm/watt Any
In-line fan Any 2.8 cfm/watt Any
Bathroom, utility room 10 1.4 cfm/watt < 90
Bathroom, utility room 90 2.8 cfm/watt Any

For SI: 1 cfm = 28.3 L/min.

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NEW SECTION
WAC 51-11R-40360   Section R403.6 -- Equipment sizing.  


R403.6 Equipment sizing (Mandatory). Heating and cooling equipment shall be sized in accordance with ACCA Manual S based on building loads calculated in accordance with ACCA Manual J or other approved heating and cooling calculation methodologies.

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NEW SECTION
WAC 51-11R-40370   Section R403.7 -- Systems serving multiple dwelling units.  


R403.7 Systems serving multiple dwelling units (Mandatory). Systems serving multiple dwelling units shall comply with Sections C403 and C404 of the IECC -- Commercial Provisions in lieu of Section R403.

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NEW SECTION
WAC 51-11R-40380   Section R403.8 -- Snow melt system controls.  


R403.8 Snow melt system controls (Mandatory). Snow and ice-melting systems, supplied through energy service to the building, shall include automatic controls capable of shutting off the system when the pavement temperature is above 50F, and no precipitation is falling and an automatic or manual control that will allow shutoff when the outdoor temperature is above 40F.

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NEW SECTION
WAC 51-11R-40390   Section R403.9 -- Pools and in-ground spas.  


R403.9 Pools and in-ground permanently installed spas (Mandatory). Pools and in-ground permanently installed spas shall comply with Sections R403.9.1 through R403.9.5.


R403.9.1 Heaters. All heaters shall be equipped with a readily accessible on-off switch that is mounted outside of the heater to allow shutting off the heater without adjusting the thermostat setting. Gas-fired heaters shall not be equipped with constant burning pilot lights.


R403.9.2 Time switches. Time switches or other control method that can automatically turn off and on heaters and pumps according to a preset schedule shall be installed on all heaters and pumps. Heaters, pumps and motors that have built in timers shall be deemed in compliance with this requirement.


EXCEPTIONS: 1. Where public health standards require 24-hour pump operation.
2. Where pumps are required to operate solar- and waste-heat-recovery pool heating systems.

R403.9.3 Covers. Heated pools and in-ground permanently installed spas shall be provided with a vapor-retardant cover.


EXCEPTION: Pools deriving over 70 percent of the energy for heating from site-recovered energy, such as a heat pump or solar energy source computed over an operating season.

R403.9.4 Residential pool pumps. Pool pump motors may not be split-phase or capacitor start-induction run type.


R403.9.4.1 Two-speed capability.

1. Pump motors: Pool pump motors with a capacity of 1 hp or more shall have the capability of operating at two or more speeds with low speed having a rotation rate that is no more than one-half of the motor's maximum rotation rate.

2. Pump controls: Pool pump motor controls shall have the capability of operating the pool pump with at least two speeds. The default circulation speed shall be the lowest speed, with a high speed override capability being for a temporary period not to exceed one normal cycle.


R403.9.4.2 Pump operation. Circulating water systems shall be controlled so that the circulation pump(s) can be conveniently turned off, automatically or manually, when the water system is not in operation.

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NEW SECTION
WAC 51-11R-40400   Section R404 -- Electrical power and lighting systems.  

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NEW SECTION
WAC 51-11R-40410   Section R404.1 -- Lighting equipment.  


R404.1 Lighting equipment (Mandatory). A minimum of 75 percent of permanently installed lamps in lighting fixtures shall be high-efficacy lamps.


R404.1.1 Lighting equipment (Mandatory). Fuel gas lighting systems shall not have continuously burning pilot lights.

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NEW SECTION
WAC 51-11R-40500   Section R405 -- Simulated performance alternative (Performance).  

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NEW SECTION
WAC 51-11R-40510   Section R405.1 -- Scope.  


R405.1 Scope. This section establishes criteria for compliance using simulated energy performance analysis. Such analysis shall include heating, cooling, and service water heating energy only.

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NEW SECTION
WAC 51-11R-40520   Section R405.2 -- Mandatory requirements.  


R405.2 Mandatory requirements. Compliance with this section requires that the mandatory provisions identified in Section R401.2 be met. All supply and return ducts not completely inside the building thermal envelope shall be insulated to a minimum of R-8.

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NEW SECTION
WAC 51-11R-40530   Section R405.3 -- Performance-based compliance.  


R405.3 Performance-based compliance. Compliance based on simulated energy performance requires that a proposed residence (proposed design) be shown to have an annual energy consumption based on site energy expressed in Btu and Btu per square foot of conditioned floor area as follows:

1. For structures less than 1,500 square feet of conditioned floor area, the annual energy consumption shall be less than or equal to 97 percent of the annual energy consumption of the standard reference design.

2. For structures 1,500 to 5,000 square feet of conditioned floor area, the annual energy consumption shall be no more than 89 percent of the standard reference design.

3. For structures over 5,000 square feet of conditioned floor area, the annual energy consumption shall be no more than 83 percent of the standard reference design.

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NEW SECTION
WAC 51-11R-40540   Section R405.4 -- Documentation.  


R405.4 Documentation. Documentation of the software used for the performance design and the parameters for the building shall be in accordance with Sections R405.4.1 through R405.4.3.


R405.4.1 Compliance software tools. Documentation verifying that the methods and accuracy of the compliance software tools conform to the provisions of this section shall be provided to the code official.


R405.4.2 Compliance report. Compliance software tools shall generate a report that documents that the proposed design complies with Section R405.3. The compliance documentation shall include the following information:

1. Address or other identification of the residence;

2. An inspection checklist documenting the building component characteristics of the proposed design as listed in Table R405.5.2(1). The inspection checklist shall show results for both the standard reference design and the proposed design, and shall document all inputs entered by the user necessary to reproduce the results;

3. Name of individual completing the compliance report; and

4. Name and version of the compliance software tool.


EXCEPTION: Multiple orientations. When an otherwise identical building model is offered in multiple orientations, compliance for any orientation shall be permitted by documenting that the building meets the performance requirements in each of the four cardinal (north, east, south and west) orientations.

R405.4.3 Additional documentation. The code official shall be permitted to require the following documents:

1. Documentation of the building component characteristics of the standard reference design.

2. A certification signed by the builder providing the building component characteristics of the proposed design as given in Table R405.5.2(1).

3. Documentation of the actual values used in the software calculations for the proposed design.

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NEW SECTION
WAC 51-11R-40550   Section R405.5 -- Calculation procedure.  


R405.5 Calculation procedure. Calculations of the performance design shall be in accordance with Sections R405.5.1 and R405.5.2.


R405.5.1 General. Except as specified by this section, the standard reference design and proposed design shall be configured and analyzed using identical methods and techniques.


R405.5.2 Residence specifications. The standard reference design and proposed design shall be configured and analyzed as specified by Table R405.5.2(1). Table R405.5.2(1) shall include by reference all notes contained in Table R402.1.1.

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NEW SECTION
WAC 51-11R-40551   Table R405.5.2(1) -- Specifications for the standard reference and proposed designs.  


TABLE R405.5.2(1)

SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS


BUILDING COMPONENT STANDARD REFERENCE DESIGN PROPOSED DESIGN
Above-grade walls Type: Mass wall if proposed wall is mass; otherwise wood frame.

Gross area: Same as proposed

U-factor: From Table R402.1.3

Solar absorptance = 0.75

Remittance = 0.90

As proposed

As proposed

As proposed

As proposed

As proposed

Basement and crawl space walls Type: Same as proposed

Gross area: Same as proposed

U-factor: From Table R402.1.3, with insulation layer on interior side of walls.

As proposed

As proposed

As proposed

Above-grade floors Type: Wood frame

Gross area: Same as proposed

U-factor: From Table R402.1.3

As proposed

As proposed

As proposed

Ceilings Type: Wood frame

Gross area: Same as proposed

U-factor: From Table R402.1.3

As proposed

As proposed

As proposed

Roofs Type: Composition shingle on wood sheathing

Gross area: Same as proposed

Solar absorptance = 0.75

Emittance = 0.90

As proposed

As proposed

As proposed

As proposed

Attics Type: Vented with aperture = 1 ft2 per 300 ft2 ceiling area As proposed
Foundations Type: Same as proposed foundation wall area above and below-grade and soil characteristics: Same as proposed. As proposed
Doors Area: 40 ft2

Orientation: North

U-factor: Same as fenestration from Table R402.1.3.

As proposed

As proposed

As proposed

Glazinga Total areab =

(a) The proposed glazing area; where proposed glazing area is less than 15% of the conditioned floor area.

(b) 15% of the conditioned floor area; where the proposed glazing area is 15% or more of the conditioned floor area.

As proposed
Orientation: Equally distributed to four cardinal compass orientations

(N, E, S & W).

As proposed
U-factor: From Table R402.1.3 As proposed
SHGC: From Table R402.1.1 except that for climates with no requirement (NR) SHGC = 0.40 shall be used. As proposed
Interior shade fraction: 0.92 - (0.21 × SHGC for the standard reference design)

External shading: None

0.92 - (0.21 × SHGC as proposed)

As proposed

Skylights None As proposed
TABLE R405.5.2(1) -- Continued

SPECIFICATIONS FOR THE STANDARD REFERENCE AND PROPOSED DESIGNS

BUILDING COMPONENT STANDARD REFERENCE DESIGN PROPOSED DESIGN
Air exchange rate Air leakage rate of 5 air changes per hour in Climate Zones 1 and 2, and 5 air changes per hour in Climate Zones 3 through 8 at a pressure of 0.2 inches w.g. (50 Pa). The mechanical ventilation rate shall be in addition to the air leakage rate and the same as in the proposed design, but no greater than 0.01 × CFA + 7.5 × (Nbr + 1)

where:

CFA = conditioned floor area

Nbr = number of bedrooms

- Energy recovery shall not be assumed for mechanical ventilation.

For residences that are not tested, the same air leakage rate as the standard reference design. For tested residences, the measured air exchange ratec. The mechanical ventilation rated shall be in addition to the air leakage rate and shall be as proposed.
Mechanical ventilation None, except where mechanical ventilation is specified by the proposed design, in which case:

Annual vent fan energy use:

kWh/yr = .03942 × CFA + 29.565 × (Nbr + 1)

where:

CFA = conditioned floor area

Nbr = number of bedrooms

As proposed
Internal gains IGain = 17,900 + 23.8 × CFA + 4104 × Nbr (Btu/day per dwelling unit) Same as standard reference design
Internal mass An internal mass for furniture and contents of 8 pounds per square foot of floor area. Same as standard reference design, plus any additional mass specifically designed as a thermal storage elemente but not integral to the building envelope or structure.
Structural mass For masonry floor slabs, 80% of floor area covered by R-2 carpet and pad, and 20% of floor directly exposed to room air. As proposed
For masonry basement walls, as proposed, but with insulation required by Table R402.1.3 located on the interior side of the walls As proposed
For other walls, for ceilings, floors, and interior walls, wood frame construction As proposed
Heating systemsf, g For all system types other than electric heating without a heat pump, the same system type as with the prevailing federal minimum efficiency.

Where the proposed design utilizes electric heating without a heat pump the standard reference design shall be an air source heat pump meeting the requirements of Section R403 of the IECCCommercial Provisions.

Capacity: Sized in accordance with Section R403.6

As proposed
Cooling systemsf, h As proposed

Capacity: Sized in accordance with Section R403.6.

As proposed
Service water heatingf, g, h, i As proposed

Use: Same as proposed design

As proposed

gal/day = 30 + (10 × Nbr)

Thermal distribution systems Thermal distribution system efficiency shall be as tested or as specified in Table R405.5.2(2) if not tested. Duct insulation shall be as proposed.
Thermostat Type: Manual, cooling temperature setpoint = 75F;

Heating temperature setpoint = 72F

Same as standard reference

For SI: 1 square foot = 0.93 m2, 1 British thermal unit = 1055 J, 1 pound per square foot = 4.88 kg/m2, 1 gallon (U.S.) = 3.785 L, C = (F-3)/1.8, 1 degree = 0.79 rad
a Glazing shall be defined as sunlight-transmitting fenestration, including the area of sash, curbing or other framing elements, that enclose conditioned space. Glazing includes the area of sunlight-transmitting fenestration assemblies in walls bounding conditioned basements. For doors where the sunlight-transmitting opening is less than 50 percent of the door area, the glazing area is the sunlight-transmitting opening area. For all other doors, the glazing area is the rough frame opening area for the door including the door and the frame.
b For residences with conditioned basements, R-2 and R-4 residences and townhouses, the following formula shall be used to determine glazing area:

AF = As x FA x F
where:
AF = Total glazing area.
As = Standard reference design total glazing area.
FA = (Above-grade thermal boundary gross wall area)/(above-grade boundary wall area + 0.5 x below-grade boundary wall area).
F = (Above-grade thermal boundary wall area)/(above-grade thermal boundary wall area + common wall area) or 0.56, whichever is greater.
and where:
Thermal boundary wall is any wall that separates conditioned space from unconditioned space or ambient conditions.
Above-grade thermal boundary wall is any thermal boundary wall component not in contact with soil.
Below-grade boundary wall is any thermal boundary wall in soil contact.
Common wall area is the area of walls shared with an adjoining dwelling unit.
L and CFA are in the same units.

c Where required by the code official, testing shall be conducted by an approved party. Hourly calculations as specified in the ASHRAE Handbook of Fundamentals, or the equivalent, shall be used to determine the energy loads resulting from infiltration.
d The combined air exchange rate for infiltration and mechanical ventilation shall be determined in accordance with Equation 43 of 2001 ASHRAE Handbook of Fundamentals, page 26.24 and the "Whole-house Ventilation" provisions of 2001 ASHRAE Handbook of Fundamentals, page 26.19 for intermittent mechanical ventilation.
e Thermal storage element shall mean a component not part of the floors, walls or ceilings that is part of a passive solar system, and that provides thermal storage such as enclosed water columns, rock beds, or phase-change containers. A thermal storage element must be in the same room as fenestration that faces within 15 degrees (0.26 rad) of true south, or must be connected to such a room with pipes or ducts that allow the element to be actively charged.
f For a proposed design with multiple heating, cooling or water heating systems using different fuel types, the applicable standard reference design system capacities and fuel types shall be weighted in accordance with their respective loads as calculated by accepted engineering practice for each equipment and fuel type present.
g For a proposed design without a proposed heating system, a heating system with the prevailing federal minimum efficiency shall be assumed for both the standard reference design and proposed design.
h For a proposed design home without a proposed cooling system, an electric air conditioner with the prevailing federal minimum efficiency shall be assumed for both the standard reference design and the proposed design.
i For a proposed design with a nonstorage-type water heater, a 40-gallon storage-type water heater with the prevailing federal minimum energy factor for the same fuel as the predominant heating fuel type shall be assumed. For the case of a proposed design without a proposed water heater, a 40-gallon storage-type water heater with the prevailing federal minimum efficiency for the same fuel as the predominant heating fuel type shall be assumed for both the proposed design and standard reference design.

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NEW SECTION
WAC 51-11R-40552   Table R405.5.2(2) -- Default distribution system efficiencies for proposed designs.  


TABLE R405.5.2(2)

DEFAULT DISTRIBUTION SYSTEM EFFICIENCIES FOR PROPOSED DESIGNSa


DISTRIBUTION SYSTEM CONFIGURATION AND CONDITION FORCED AIR SYSTEMS HYDRONIC SYSTEMSb
Distribution system components located in unconditioned space - 0.95
Untested distribution systems entirely located in conditioned spacec 0.88 1
"Ductless” systemsd 1 -

For SI: 1 cubic foot per minute = 0.47 L/s, 1 square foot = 0.093m2, 1 pound per square inch = 6895 Pa, 1 inch water gauge = 1250 Pa.
a Default values given by this table are for untested distribution systems, which must still meet minimum requirements for duct system insulation.
b Hydronic systems shall mean those systems that distribute heating and cooling energy directly to individual spaces using liquids pumped through closed-loop piping and that do not depend on ducted, forced airflow to maintain space temperatures.
c Entire system in conditioned space shall mean that no component of the distribution system, including the air-handler unit, is located outside of the conditioned space.
d Ductless systems shall be allowed to have forced airflow across a coil but shall not have any ducted airflow external to the manufacturer's air-handler enclosure.

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NEW SECTION
WAC 51-11R-40560   Section R405.6 -- Calculation software tools.  


R405.6 Calculation software tools. Calculation software, where used, shall be in accordance with Sections R405.6.1 through R405.6.3.


R405.6.1 Minimum capabilities. Calculation procedures used to comply with this section shall be software tools capable of calculating the annual energy consumption of all building elements that differ between the standard reference design and the proposed design and shall include the following capabilities:

1. Calculation of whole-building (as a single zone) sizing for the heating and cooling equipment in the standard reference design residence in accordance with Section R403.6.

2. Calculations that account for the effects of indoor and outdoor temperatures and part-load ratios on the performance of heating, ventilating and air-conditioning equipment based on climate and equipment sizing.

3. Printed code official inspection checklist listing each of the proposed design component characteristics from Table R405.5.2(1) determined by the analysis to provide compliance, along with their respective performance ratings (e.g., R-value, U-factor, SHGC, HSPF, AFUE, SEER, EF, etc.).


R405.6.2 Specific approval. Performance analysis tools meeting the applicable sections of Section R405 shall be permitted to be approved. Tools are permitted to be approved based on meeting a specified threshold for a jurisdiction. The code official shall be permitted to approve tools for a specified application or limited scope.


R405.6.3 Input values. When calculations require input values not specified by Sections R402, R403, R404 and R405, those input values shall be taken from an approved source.

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NEW SECTION
WAC 51-11R-40600   Section R406 -- Additional energy efficiency requirements.  

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NEW SECTION
WAC 51-11R-40610   Section R406.1 -- Scope.  


R406.1 Scope. This section establishes options for additional criteria to be met for one- and two-family dwellings and townhouses, as defined in Section 101.2 of the International Residential Code to demonstrate compliance with this code.

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NEW SECTION
WAC 51-11R-40620   Section R406.2 -- Additional energy efficiency requirements.  


R406.2 Additional energy efficiency requirements (Mandatory). Each dwelling unit in one- and two-family dwellings and townhouses, as defined in Section 101.2 of the International Residential Code shall comply with sufficient options from Table R406.2 so as to achieve the following minimum number of credits:


1. Small Dwelling Unit: 0.5 points
Dwelling units less than 1500 square feet in conditioned floor area with less than 300 square feet of fenestration area. Additions to existing building that are less than 750 square feet of heated floor area.
2. Medium Dwelling Unit: 1.5 points
All dwelling units that are not included in #1 or #3.
3. Large Dwelling Unit: 2.5 points
Dwelling units exceeding 5000 square feet of conditioned floor area.

The drawings included with the building permit application shall identify which options have been selected and the point value of each option, regardless of whether separate mechanical, plumbing, electrical, or other permits are utilized for the project.

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NEW SECTION
WAC 51-11R-40621   Table R406.2 -- Energy credits.  


TABLE 406.2

ENERGY CREDITS (DEBITS)


OPTION DESCRIPTION CREDIT(S)
1a EFFICIENT BUILDING ENVELOPE 1a:

Prescriptive compliance is based on Table R402.1.1 with the following modifications:

Fenestration U = 0.28

Floor R-38

Slab on grade R-10 perimeter and under entire slab

Below grade slab R-10 perimeter and under entire slab

or

Compliance based on Section R402.1.4: Reduce the Total UA by 5%.

0.5
1b EFFICIENT BUILDING ENVELOPE 1b:

Prescriptive compliance is based on Table R402.1.1 with the following modifications:

Fenestration U = 0.25

Wall R-21 plus R-4

Floor R-38

Basement wall R-21 int plus R-5 ci

Slab on grade R-10 perimeter and under entire slab

Below grade slab R-10 perimeter and under entire slab

or

Compliance based on Section R402.1.4: Reduce the Total UA by 15%.

1.0
1c EFFICIENT BUILDING ENVELOPE 1c:

Prescriptive compliance is based on Table R402.1.1 with the following modifications: Fenestration U = 0.22

Ceiling and single-rafter or joist-vaulted R-49 advanced

Wood frame wall R-21 int plus R-12 ci

Floor R-38

Basement wall R-21 int plus R-12 ci

Slab on grade R-10 perimeter and under entire slab

Below grade slab R-10 perimeter and under entire slab

or

Compliance based on Section R402.1.4: Reduce the Total UA by 30%.

2.0
2a AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION 2a:

Compliance based on R402.4.1.2: Reduce the tested air leakage to 4.0 air changes per hour maximum

and

All whole house ventilation requirements as determined by Section M1507.3 of the International Residential Code shall be met with a high efficiency fan (maximum 0.35 watts/cfm), not interlocked with the furnace fan ventilation systems using a furnace including an ECM motor are allowed, provided that they are controlled to operate at low speed in ventilation only mode.

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify.

0.5
2b AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION 2b:

Compliance based on Section R402.4.1.2: Reduce the tested air leakage to 2.0 air changes per hour maximum

and

All whole house ventilation requirements as determined by Section M1507.3 of the International Residential Code shall be met with a heat recovery ventilation system with minimum sensible heat recovery efficiency of 0.70.

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the maximum tested building air leakage and shall show the heat recovery ventilation system.

1.0
2c AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION 2c:

Compliance based on Section R402.4.1.2: Reduce the tested air leakage to 1.5 air changes per hour maximum

and

All whole house ventilation requirements as determined by Section M1507.3 of the International Residential Code shall be met with a heat recovery ventilation system with minimum sensible heat recovery efficiency of 0.85.

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the maximum tested building air leakage and shall show the heat recovery ventilation system.

1.5
3a HIGH EFFICIENCY HVAC EQUIPMENT 3a:

Gas, propane or oil-fired furnace with minimum AFUE of 95%

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the heating equipment type and the minimum equipment efficiency.

0.5
3b HIGH EFFICIENCY HVAC EQUIPMENT 3b:

Air-source heat pump with minimum HSPF of 8.5

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the heating equipment type and the minimum equipment efficiency.

1.0
3c Closed-loop ground source heat pump; with a minimum COP of 3.3

or

Open loop water source heat pump with a maximum pumping hydraulic head of 150 feet and minimum COP of 3.6

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the heating equipment type and the minimum equipment efficiency.

2.0
3d HIGH EFFICIENCY HVAC EQUIPMENT 3d:

DUCTLESS SPLIT SYSTEM HEAT PUMPS, ZONAL CONTROL:

In home where the primary space heating system is zonal electric heating, a ductless heat pump system shall be installed and provide heating to at least one zone of the housing unit.

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the heating equipment type and the minimum equipment efficiency.

1.0
4 HIGH EFFICIENCY HVAC DISTRIBUTION SYSTEM:1

All heating and cooling system components installed inside the conditioned space. All combustion equipment shall be direct vent or sealed combustion.

Locating system components in conditioned crawl spaces is not permitted under this option.

Electric resistance heat is not permitted under this option.

Direct combustion heating equipment with AFUE less than 80% is not permitted under this option.

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the heating equipment type and shall show the location of the heating and cooling equipment and all the ductwork.

1.0
5a EFFICIENT WATER HEATING 5a:

Water heating system shall include one of the following:

Gas, propane or oil water heater with a minimum EF of 0.62

or

Electric water heater with a minimum EF of 0.93.

and for both cases

All showerhead and kitchen sink faucets installed in the house shall be rated at 1.75 GPM or less. All other lavatory faucets shall be rated at 1.0 GPM or less.2

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the water heater equipment type and the minimum equipment efficiency and shall specify the maximum flow rates for all showerheads, kitchen sink faucets, and other lavatory faucets.

0.5
5b EFFICIENT WATER HEATING 5b:

Water heating system shall include one of the following:

Gas, propane or oil water heater with a minimum EF of 0.82

or

Solar water heating supplementing a minimum standard water heater. Solar water heating will provide a rated minimum savings of 85 therms or 2000 kWh based on the Solar Rating and Certification Corporation (SRCC) Annual Performance of OG-300 Certified Solar Water Heating Systems

or

Electric heat pump water heater with a minimum EF of 2.0 and meeting the standards of NEEA's Northern Climate Specifications for Heat Pump Water Heaters

or

Water heater heated by ground source heat pump meeting the requirements of Option 3c.

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall specify the water heater equipment type and the minimum equipment efficiency and, for solar water heating systems, the calculation of the minimum energy savings.

1.5
6 RENEWABLE ELECTRIC ENERGY:

For each 1200 kWh of electrical generation provided annually by on-site wind or solar equipment a 0.5 credit shall be allowed, up to 3 credits. Generation shall be calculated as follows:

For solar electric systems, the design shall be demonstrated to meet this requirement using the National Renewable Energy Laboratory calculator PVWATTs. Documentation noting solar access shall be included on the plans.

For wind generation projects designs shall document annual power generation based on the following factors:

The wind turbine power curve; average annual wind speed at the site; frequency distribution of the wind speed at the site and height of the tower.

To qualify to claim this credit, the building permit drawings shall specify the option being selected and shall show the photovoltaic or wind turbine equipment type, provide documentation of solar and wind access, and include a calculation of the minimum annual energy power production.

0.5

Footnotes: 1 Interior Duct Placement. Ducts included as Option 4 of Table R406.2 shall be placed wholly within the heated envelope of the housing unit. The placement shall be inspected and certified to receive the credits associated with this option.
EXCEPTION: Ducts complying with this section may have up to 5% of the total linear feet of ducts located in the exterior cavities or buffer spaces of the dwelling. If this exception is used the ducts will be tested to the following standards:
Post-construction test: Leakage to outdoors shall be less than or equal to 1 CFM per 100 ft2 of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the entire system, including the manufacturer's air handler enclosure. All register boots shall be taped or otherwise sealed during the test.
2 Plumbing Fixtures Flow Ratings. Low flow plumbing fixtures (water closets and urinals) and fittings (faucets and showerheads) shall comply with the following requirements:
a Residential bathroom lavatory sink faucets: Maximum flow rate - 3.8 L/min (1.0 gal/min) when tested in accordance with ASME A112.18.1/CSA B125.1.
b Residential kitchen faucets: Maximum flow rate - 6.6 L/min (1.75 gal/min) when tested in accordance with ASME A112.18.1/CSA B125.1.
c Residential showerheads: Maximum flow rate - 6.6 L/min (1.75 gal/min) when tested in accordance with ASME A112.18.1/CSA B125.1.

[]


NEW SECTION
WAC 51-11R-50000   Chapter 5 -- Referenced standards.   This chapter lists the standards that are referenced in various sections of this document. The standards are listed herein by the promulgating agency of the standard, the standard identification, the effective date and title, and the section or sections of this document that reference the standard. The application of the referenced standards shall be as specified in Section R106.


AAMA American Architectural Manufacturers Association
1827 Walden Office Square
Suite 550
Schaumburg, IL 60173-4268
Standard reference number Title Referenced in code section number
AAMA/WDMA/CSA

101/I.S.2/A C440-11

North American Fenestration Standard/Specifications for Windows, Doors and Unit Skylights . . . . . . . . R402.4.3
ACCA Air Conditioning Contractors of America
2800 Shirlington Road, Suite 300
Arlington, VA 22206
Standard reference number Title Referenced in code section number
Manual J-11 Residential Load Calculation Eighth Edition R403.6
Manual S-10 Residential Equipment . . . . . . . . R403.6
ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
1791 Tullie Circle, N.E.
Atlanta, GA 30329-2305
Standard reference number Title Referenced in code section number
ASHRAE-2009 ASHRAE Handbook of Fundamentals R402.1.4, Table R405.5.2(1)
ASHRAE 193-2010 Method of Test for Determining the Airtightness of HVAC Equipment . . . . . . . . R403.2.2.1
ASTM ASTM International
100 Barr Harbor Drive
West Conshohocken, PA 19428-2859
Standard reference number Title Referenced in code section number
E 283-04 Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls and Doors Under Specified Pressure Differences Across the Specimen . . . . . . . . R402.4.4
CSA Canadian Standards Association
5060 Spectrum Way
Mississauga, Ontario, Canada L4W 5N6
Standard reference number Title Referenced in code section number
AAMA/WDMA/CSA

101/I.S.2/A440-11

North American Fenestration Standard/Specification for Windows, Doors and Unit Skylights . . . . . . . . R402.4.3
ICC International Code Council, Inc.
500 New Jersey Avenue, N.W.
6th Floor
Washington, DC 20001
Standard reference number Title Referenced in code section number
IBC-12 International Building Code . . . . . . . . R201.3, R303.2, R402.2.10
ICC 400-12 Standard on the Design and Construction of Log Structures . . . . . . . . Table R402.4.1.1
IFC-12 International Fire Code . . . . . . . . R201.3
IFGC-12 International Fuel Gas Code . . . . . . . . R201.3
IMC-12 International Mechanical Code . . . . . . . . R201.3, R403.2.2, R403.5
IPC-12 International Plumbing Code . . . . . . . . R201.3
IRC-12 International Residential Code . . . . . . . . R201.3, R303.2, R402.2.10, R403.2.2, R403.5
NEEA Northwest Energy Efficiency Alliance
421 S.W. 6th Ave., Suite 600
Portland, OR 97204
Standard reference number Title Referenced in code section number
NEEA-2011 Northern Climate Specification for Heat Pump Water Heaters, Vers. 4.0 . . . . . . . . Table R406.2
NFRC National Fenestration Rating Council, Inc.
6305 Ivy Lane, Suite 140
Greenbelt, MD 20770
Standard reference number Title Referenced in code section number
100-2009 Procedure for Determining Fenestration Products U-factors - Second Edition . . . . . . . . R303.1.3
200-2009 Procedure for Determining Fenestration Product Solar Heat Gain Coefficients and Visible Transmittance at Normal Incidence - Second Edition . . . . . . . . R303.1.3
400-2009 Procedure for Determining Fenestration Product Air Leakage - Second Edition . . . . . . . . R402.4.3
US-FTC United States-Federal Trade Commission
600 Pennsylvania Avenue N.W.
Washington, DC 20580
Standard reference number Title Referenced in code section number
C.F.R. Title 16

(May 31, 2005)

R-value . . . . . . . . Rule R303.1.4
WDMA Window and Door Manufacturers Association
1400 East Touhy Avenue, Suite 470
Des Plaines, IL 60018
Standard reference number Title Referenced in code section number
AAMA/WDMA/CSA

101/I.S.2/A440-11

North American Fenestration Standard/Specification for Windows, Doors and Unit Skylights . . . . . . . . R402.4.3
WSU Washington State University Energy Extension Program
905 Plum Street S.E., Bldg 3
P.O. Box 43165
Olympia, WA 98506-3166
Standard reference number Title Referenced in code section number
WSU RS 33 Duct Testing Standard for New and Existing Construction Publication No. WSUEEP12-016 . . . . . . . . R403.2.2

[]


NEW SECTION
WAC 51-11R-60000   Appendix C -- Exterior design conditions.   As required by R302.2, the heating or cooling outdoor design temperatures shall be selected from Table C-1.

[]


NEW SECTION
WAC 51-11R-60100   Table C-1 -- Outdoor design temperatures for Washington.  


TABLE C-1

OUTDOOR DESIGN TEMPERATURES


Location Outdoor Design Temp Heating (F) Outdoor Design Temp Cooling (F)
Aberdeen 20NNE 25 83
Anacortes 24 72
Anatone -4 89
Auburn 25 84
Battleground 19 91
Bellevue 24 83
Bellingham 2N 19 78
Blaine 17 73
Bremerton 29 83
Burlington 19 77
Chehalis 21 87
Chelan 10 89
Cheney 4 94
Chesaw -11 81
Clarkston 10 94
Cle Elum 1 91
Colfax 1NW 2 94
Colville AP -2 92
Concrete 19 83
Connell 4NNW 6 100
Cougar 5E 25 93
Dallesport AP 14 99
Darrington RS 13 85
Davenport 5 92
Edmonds 24 82
Ellensburg AP 2 90
Elma 24 88
Ephrata AP 7 97
Everett Paine AFB 21 79
Forks 1E 23 81
Glacier RS 13 82
Glenoma (Kosmos) 18 89
Goldendale 7 94
Grays River Hatchery 24 86
Greenwater 1.4 84
Grotto 21 84
Hoquiam AP 26 79
Inchelium 2NW 0 92
John Day Dam 19 100
Kent 21 85
Kirkland 17 83
La Grande 23 88
Leavenworth -3 93
Little Goose Dam 22 101
Long Beach 3NNE 25 77
Longview 24 87
Lower Granite Dam 14 98
Lower Monument Dam 18 103
Marysville 23 79
Metaline Falls -1 89
Methow 2W 1 89
Nespelem 2S -4 93
Newhalem 19 89
Newport -5 92
Northport 2 92
Oak Harbor 16 74
Odessa 7 100
Olga 2SE 24 71
Olympia AP 17 85
Omak 2NW 3 90
Oroville 5 93
Othello 9 98
Packwood 16 90
Plain -3 89
Pleasant View 16 98
Pomeroy 3 95
Port Angeles 28 75
Port Townsend 25 76
Prosser 12 97
Puyallup 19 86
Quilcene 2SW 23 83
Quinault RS 25 84
Rainier, Longmire 15 85
Paradise RS 8 71
Raymond 28 81
Redmond 17 83
Republic -9 87
Richland 11 101
Ritzville 6 99
Satus Pass 10 90
Seattle: SeaTac AP 24 83
Sedro Woolley 1E 19 78
Sequim 23 78
Shelton 23 85
Smyrna 8 102
Snohomish 21 81
Snoqualmie Pass 6 80
Spokane AP 4 92
Spokane CO 10 96
Stampede Pass 7 76
Stehekin 3NW 12 85
Stevens Pass 6 77
Tacoma CO 29 82
Tatoosh Island 31 63
Toledo AP 17 84
Vancouver 22 88
Vashon Island 28 78
Walla Walla AP 6 96
Waterville 1 88
Wellpinit 1 93
Wenatchee CO 10 92
Whidbey Island 11 71
Willapa Harbor 26 81
Wilson Creek 3 96
Winthrop 1WSW -12 91
Yakima AP 11 94

ABBREVIATIONS: AFB Air Force Base AP Airport CO City Office RS Ranger Station Typical: "4(miles)NE"

[]

OTS-4954.1


REPEALER
     The following chapter of the Washington Administrative Code is repealed:
WAC 51-11-0100 Chapter 1 -- Administration and enforcement.
WAC 51-11-0101 Section 101 -- Scope and general requirements.
WAC 51-11-0102 Materials and equipment.
WAC 51-11-0103 Alternate materials -- Method of construction, design or insulating systems.
WAC 51-11-0104 Plans and specifications.
WAC 51-11-0105 Inspections and enforcement.
WAC 51-11-0106 Violations.
WAC 51-11-0107 Liability.
WAC 51-11-0108 Conflicts with other codes.
WAC 51-11-0109 Severability.
WAC 51-11-0200 Chapter 2 -- Definitions.
WAC 51-11-0201 Scope.
WAC 51-11-0300 Chapter 3 -- Design conditions.
WAC 51-11-0301 Design criteria.
WAC 51-11-0302 Thermal design parameters.
WAC 51-11-0303 Mechanical ventilation.
WAC 51-11-0400 Chapter 4 -- Building design by systems analysis.
WAC 51-11-0401 Scope.
WAC 51-11-0402 Systems analysis.
WAC 51-11-0500 Chapter 5 -- Building design by component performance approach.
WAC 51-11-0501 Scope.
WAC 51-11-0502 Building envelope requirements.
WAC 51-11-0503 Mechanical systems.
WAC 51-11-0504 Domestic water systems.
WAC 51-11-0505 Lighting.
WAC 51-11-0525 Equation 1 -- Single-family residential.
WAC 51-11-0526 Equation 2 -- All occupancies.
WAC 51-11-0527 Equation 3 -- Single-family residential.
WAC 51-11-0528 Equation 4 -- Reserved.
WAC 51-11-0529 Equation 5 -- Reserved.
WAC 51-11-0530 Table 5-1.
WAC 51-11-0531 Table 5-2 -- Reserved.
WAC 51-11-0532 Table 5-3 -- Reserved.
WAC 51-11-0533 Table 5-4 -- Reserved.
WAC 51-11-0534 Table 5-5 -- Reserved.
WAC 51-11-0535 Table 5-6 -- Reserved.
WAC 51-11-0536 Table 5-7 -- Reserved.
WAC 51-11-0537 Table 5-8 -- Reserved.
WAC 51-11-0538 Table 5-9 -- Reserved.
WAC 51-11-0539 Table 5-10 -- Reserved.
WAC 51-11-0540 Table 5-11.
WAC 51-11-0541 Table 5-12.
WAC 51-11-0542 Table 5-13 -- Reserved.
WAC 51-11-0600 Chapter 6 building design by prescriptive requirements approach.
WAC 51-11-0601 Scope.
WAC 51-11-0602 Building envelope requirements for single-family residential.
WAC 51-11-0603 Mechanical systems for single-family residential.
WAC 51-11-0604 Domestic water systems.
WAC 51-11-0605 Lighting.
WAC 51-11-0625 Table 6-1.
WAC 51-11-0700 Chapter 7 -- Standards.
WAC 51-11-0701 Scope.
WAC 51-11-0800 Section 0800 -- Suggested software for chapter 4 systems analysis approach.
WAC 51-11-0900 Chapter 0900 -- Additional residential energy efficiency requirements.
WAC 51-11-1000 Chapter 10.
WAC 51-11-1001 Section 1001 General.
WAC 51-11-1002 Section 1002: Below grade walls and slabs.
WAC 51-11-1003 Section 1003: On-grade slab floors.
WAC 51-11-1004 Section 1004: Floors over unconditioned space.
WAC 51-11-1005 Section 1005: Above-grade walls.
WAC 51-11-1006 Section 1006 Default U-factors for glazing and doors.
WAC 51-11-1007 Section 1007 Ceilings.
WAC 51-11-1008 Section 1008 Air infiltration.
WAC 51-11-1009 Section 1009 Mass.
WAC 51-11-1100 Title.
WAC 51-11-1110 Purpose and intent.
WAC 51-11-1120 Scope.
WAC 51-11-1130 Application to existing buildings.
WAC 51-11-1131 Additions to existing buildings.
WAC 51-11-1132 Alterations and repairs.
WAC 51-11-1133 Change of occupancy or use.
WAC 51-11-1134 Historic buildings.
WAC 51-11-1135 Commissioning.
WAC 51-11-1140 Enforcement.
WAC 51-11-1141 Plans and specifications.
WAC 51-11-1142 Materials and equipment.
WAC 51-11-1143 Inspections.
WAC 51-11-1144 Violations.
WAC 51-11-1150 Conflicts with other codes.
WAC 51-11-1160 Severability and liability.
WAC 51-11-1200 Reserved.
WAC 51-11-1301 Scope.
WAC 51-11-1302 Space heat type.
WAC 51-11-1303 Climate zones.
WAC 51-11-1310 General requirements.
WAC 51-11-1311 Insulation.
WAC 51-11-1312 Glazing and doors.
WAC 51-11-1313 Moisture control.
WAC 51-11-1314 Air leakage.
WAC 51-11-1320 Prescriptive building envelope option.
WAC 51-11-1321 General.
WAC 51-11-1322 Opaque envelope.
WAC 51-11-1323 Glazing.
WAC 51-11-1330 Component performance building envelope option.
WAC 51-11-1331 General.
WAC 51-11-1332 Component U-factors.
WAC 51-11-1333 UA calculations.
WAC 51-11-1334 Solar heat gain coefficient rate calculations.
WAC 51-11-1401 Scope.
WAC 51-11-1402 Mechanical ventilation.
WAC 51-11-1410 General requirements.
WAC 51-11-1411 HVAC equipment performance requirements.
WAC 51-11-1412 Controls.
WAC 51-11-1413 Economizers.
WAC 51-11-1414 Ducting systems.
WAC 51-11-1415 Piping systems.
WAC 51-11-1416 Commissioning and completion requirements.
WAC 51-11-1420 Simple systems (packaged unitary equipment).
WAC 51-11-1421 System type.
WAC 51-11-1422 Controls.
WAC 51-11-1423 Economizers.
WAC 51-11-1424 Separate air distribution systems.
WAC 51-11-1430 Complex systems.
WAC 51-11-1431 System type.
WAC 51-11-1432 Controls.
WAC 51-11-1433 Economizers.
WAC 51-11-1434 Separate air distribution systems.
WAC 51-11-1435 Simultaneous heating and cooling.
WAC 51-11-1436 Heat recovery.
WAC 51-11-1437 Electric motor efficiency.
WAC 51-11-1438 System criteria.
WAC 51-11-1439 Exhaust systems.
WAC 51-11-1440 Domestic water systems.
WAC 51-11-1441 Water heater installation.
WAC 51-11-1442 Shut-off controls.
WAC 51-11-1443 Pipe insulation.
WAC 51-11-1444 Conservation of water and pumping energy.
WAC 51-11-1445 Heat recovery for domestic water systems.
WAC 51-11-1446 Domestic hot water meters.
WAC 51-11-1450 Heated pools.
WAC 51-11-1451 General.
WAC 51-11-1452 Pool water heaters.
WAC 51-11-1453 Controls.
WAC 51-11-1454 Pool covers and insulation.
WAC 51-11-1460 Cold storage.
WAC 51-11-1501 Scope.
WAC 51-11-1510 General requirements.
WAC 51-11-1511 Electric motors.
WAC 51-11-1512 Exempt lighting.
WAC 51-11-1513 Lighting controls.
WAC 51-11-1514 Exit signs.
WAC 51-11-1520 Prescriptive lighting option.
WAC 51-11-1521 Prescriptive interior lighting requirements.
WAC 51-11-1522 Prescriptive exterior lighting requirements.
WAC 51-11-1530 Lighting power allowance option.
WAC 51-11-1531 Interior lighting power allowance.
WAC 51-11-1532 Exterior lighting power allowance.
WAC 51-11-99901 Section 1 -- General.
WAC 51-11-99902 Section 2 -- Simulation general requirements.
WAC 51-11-99903 Section 3--Calculation of the proposed and baseline building performance.
WAC 51-11-99904 Section 4 -- Suggested software for systems analysis approach.

Washington State Code Reviser's Office