Equipment Type | Size Category (input) | Subcategory or Rating Condition | Draw Pattern | Performance Requireda,j | Test Procedureb |
Electric table-top water heatersk | ≤ 12 kWc | ≥ 20 gal ≤ 120 gal | Very small Low Medium High | UEF ≥ 0.6323 - (0.0058 × Vr) UEF ≥ 0.9188 - (0.0031 × Vr) UEF ≥ 0.9577 - (0.0023 × Vr) UEF ≥ 0.9884 - (0.0016 × Vr) | DOE 10 C.F.R. Part 430 App. E |
Electric storage water heatersg,i resistance and heat pump | ≤ 12 kWc | ≥ 20 gal ≤ 55 gal | Very small Low Medium High | UEF ≥ 0.8808 - (0.0008 × Vr) UEF ≥ 0.9254 - (0.0003 × Vr) UEF ≥ 0.9307 - (0.0002 × Vr) UEF ≥ 0.9349 - (0.0001 × Vr) | DOE 10 C.F.R. Part 430 App. E |
≤ 12 kW | ˃ 55 gal ≤ 120 gal | Very small Low Medium High | UEF ≥ 1.9236 - (0.0011 × Vr) UEF ≥ 2.0440 - (0.0011 × Vr) UEF ≥ 2.1171 - (0.0011 × Vr) UEF ≥ 2.2418 - (0.0011 × Vr) | DOE 10 C.F.R. Part 430 App. E |
Electric storage water heatersg | ˃ 12 kW | | | (0.3 + 27/Vm), %h | DOE 10 C.F.R. 431.106 App B. |
Grid-enabled water heatersg,l | | ˃ 75 gal | Very small Low Medium High | UEF ≥ 1.0136 - (0.0028 × Vr) UEF ≥ 0.9984 - (0.0014 × Vr) UEF ≥ 0.9853 - (0.0010 × Vr) UEF ≥ 0.9720 - (0.0007 × Vr) | 10 C.F.R. 430 Appendix E |
Electric instantaneous water heaterh | ≤ 12 kW | < 2 gal | Very small Low Medium High | UEF ≥ 0.91 UEF ≥ 0.91 UEF ≥ 0.91 UEF ≥ 0.92 | DOE 10 C.F.R. Part 430 |
˃ 12 kW & ≤ 58.6 kWc | ≤ 2 gal ≤ 180°F | All | UEF ≥ 0.80 | DOE 10 C.F.R. Part 430 |
Gas storage water heatersg | ≤ 75,000 Btu/h | ≥ 20 gal & ≤ 55 galf | Very small Low Medium High | UEF ≥ 0.3456 - (0.0020 × Vr) UEF ≥ 0.5982 - (0.0019 × Vr) UEF ≥ 0.6483 - (0.0017 × Vr) UEF ≥ 0.6920 - (0.0013 × Vr) | DOE 10 C.F.R. Part 430 App. E |
≤ 75,000 Btu/h | ˃ 55 gal & ≤ 100 galf | Very small Low Medium High | UEF ≥ 0.6470 - (0.0006 × Vr) UEF ≥ 0.7689 - (0.0005 × Vr) UEF ≥ 0.7897 - (0.0004 × Vr) UEF ≥ 0.8072 - (0.0003 × Vr) | DOE 10 C.F.R. Part 430 App. E |
˃ 75,000 Btu/h and ≤ 105,000 Btu/hd | ≤ 120 gal ≤ 180°F | Very small Low Medium High | UEF ≥ 0.2674-0.0009 x Vr UEF ≥ 0.5362-0.0012 x Vr UEF ≥ 0.6002-0.0011 x Vr UEF ≥ 0.6597-0.0009 x Vr | DOE 10 C.F.R. Part 430 App. E |
˃ 105,000 Btu/hd,f | | | 80% Et SL ≤ (Q/800 +110√V), Btu/h | DOE 10 C.F.R. 431.106 |
Gas instantaneous water heaterh | ˃ 50,000 Btu/h and < 200,000 Btu/h | < 2 gal | Very small Low Medium High | UEF ≥ 0.80 UEF ≥ 0.81 UEF ≥ 0.81 UEF ≥ 0.81 | DOE 10 C.F.R. Part 430 App. E |
≥ 200,000 Btu/hd,f | < 10 gal | | 80% Et | DOE 10 C.F.R. 431.106 |
≥ 200,000 Btu/hf | ≥ 10 gal | | 80% Et SL ≤ (Q/800 +110√V), Btu/h |
Oil storage water heatersg | ≤ 105,000 Btu/h | ≤ 50 gal | Very small Low Medium High | UEF = 0.2509 – (0.0012 × Vr) UEF = 0.5330 – (0.0016 × Vr) UEF = 0.6078 – (0.0016 × Vr) UEF = 0.6815 – (0.0014 × Vr) | DOE 10 C.F.R. Part 430 |
˃ 105,000 Btu/h and ≤ 140,000 Btu/he | ≤ 120 gal ≤ 180°F | Very small Low Medium High | UEF ≥ 0.2932-0.0015 x Vr UEF ≥ 0.5596-0.0018 x Vr UEF ≥ 0.6194-0.0016 x Vr UEF ≥ 0.6740-0.0013 x Vr | DOE 10 C.F.R. Part 430 App. E |
˃ 140,000 Btu/h | | | 80% Et SL ≤ (Q/800 +110√V), Btu/h | DOE 10 C.F.R. 431.106 |
Oil instantaneous water heaterh | ≤ 210,000 Btu/h | < 2 gal | | 80% Et EF ≥ 0.59 - 0.0005 x V | DOE 10 C.F.R. Part 430 App. E |
˃ 210,000 Btu/h | < 10 gal | | 80% Et | DOE 10 C.F.R. 431.106 |
˃ 210,000 Btu/h | ≥ 10 gal | | 78% Et SL ≤ (Q/800 +110√V), Btu/h | DOE 10 C.F.R. 431.106 |
Hot water supply boilers, gas and oilh | ≥ 300,000 Btu/h and < 12,500,000 Btu/h | < 10 gal | | 80% Et | DOE 10 C.F.R. 431.106 |
Hot water supply boilers, gash | ≥ 300,000 Btu/h and < 12,500,000 Btu/h | ≥ 10 gal | | 80% Et SL ≤ (Q/800 +110√V), Btu/h | DOE 10 C.F.R. 431.106 |
Hot water supply boilers, oilh | ≥ 300,000 Btu/h and < 12,500,000 Btu/h | ≥ 10 gal | | 78% Et SL ≤ (Q/800 +110√V), Btu/h | DOE 10 C.F.R. 431.106 |
Pool heaters, gas | All | | | 82% Et | DOE 10 C.F.R. Part 430 App. P |
Heat pump pool heaters | All | 50°F db 44.2°F wb outdoor air 80.0°F entering water | | 4.0 COP | DOE 10 C.F.R. Part 430 App. P |
Unfired storage tanks | All | | | Minimum insulation requirement R-12.5 (h-ft2-°F)/Btu | (none) |