Model lines
Of the 187 rating sets on the certified list, 183 belong to the 67 model lines below. The other four are single solar systems, listed on the Solar page. The largest, Rheem PROPHxx T2 RH375-xx, covers 121 model numbers; among heat pumps, SanCO2 GS5-45HPC HP with ECO tanks spans the widest range of rated volume, 43 to 119 gal. Of all the lines, 14 consist of a single rating set.
Certified models as of October 27, 2026. A line groups the sizes of one product: model numbers that differ only in their digits. Solar systems are grouped by listing partner.
| Model line | Rating sets | Model numbers | Range |
|---|---|---|---|
| Heat-pump water heaters33 lines, 609 model numbers | |||
| Rheem PROPHxx T2 RH375-xxRheem Sales Company | 8 | 121 | 36–72 gal rated |
| Midea CAN3-RSJ-15/xxRDVN3-LxxGD Midea, 1HVAC Energy, Rinnai America, North American HVAC Products, Senville Air Conditioners, Bosch Thermotechnology, THE GRANITE GROUP WHOLESALERS, ECO-LOGICAL, Perfect Aire, Azure Canada, Novair Heat Pumps and Stream33 Products | 6 | 76 | 46–75 gal rated |
| A. O. Smith HPACO-45 1 with AXST tanksA.O. Smith | 4 | 59 | 45–73 gal rated |
| Friedrich PROHxx T2 FD310BMRheem Sales Company | 4 | 48 | 36–72 gal rated |
| Rheem PROPHxx T0 RH120-MRheem Sales Company | 4 | 40 | 36–72 gal rated |
| A. O. Smith CAHP-xx 2A.O. Smith | 4 | 36 | 36–81 gal rated |
| A. O. Smith HPxxH45DV 1A.O. Smith | 2 | 29 | 46–82 gal rated |
| Giant GTHPCO-45 1+GTXST-50S 1A.O. Smith | 1 | 25 | 46 gal rated |
| A. O. Smith HPS10-xxH45DV 2A.O. Smith | 3 | 21 | 46–82 gal rated |
| A. O. Smith HPTV-xx 2A.O. Smith | 3 | 18 | 46–82 gal rated |
| Vaughn Thermal MExxHPTVaughn Thermal | 4 | 16 | 47–109 gal rated |
| A. O. Smith FPTU-xx 1A.O. Smith | 3 | 15 | 46–82 gal rated |
| A. O. Smith HPTU-66CTA 1A.O. Smith | 1 | 13 | 67 gal rated |
| LG APHWCxxDLG Electronics | 4 | 12 | 53–72 gal rated |
| American Standard ASHPWH-xxAriston USA | 4 | 8 | 37–73 gal rated |
| Ariston ARIHPWH-xx-TAriston USA | 4 | 8 | 37–74 gal rated |
| Bradford White RE2HPxx-1NCTTBradford White | 3 | 6 | 45–75 gal rated |
| Rheem PROPH50 T0 RH120Rheem Sales Company | 1 | 6 | 46 gal rated |
| Rinnai REHPxxRinnai America | 2 | 6 | 46–75 gal rated |
| SanCO2 GS5-45HPC HP with ECO tanksECO2 Systems | 3 | 6 | 43–119 gal rated |
| Arctic Arctic-HP-Hot Water-KA06-xxArctic Heat Pumps and Guangdong Phnix Technology | 2 | 4 | 44.5–71 gal rated |
| Bradford White RE2HxxT-Bradford White | 2 | 4 | 64–75 gal rated |
| GE Profile PFxxS10FPY01GE Appliances | 4 | 4 | 40–80 gal rated |
| GE Profile PHxxS10BPY01GE Appliances | 4 | 4 | 40–80 gal rated |
| Reclaim Energy MPxxF-RCVaughn Thermal | 2 | 4 | 80–119 gal rated |
| Eco-Logical OMNI-xxHPxx-1AECO-LOGICAL | 3 | 3 | 46–74 gal rated |
| GE Profile PHxxS10BNY01GE Appliances | 3 | 3 | 50–80 gal rated |
| Navien NWP500SxxAUMBNavien | 3 | 3 | 44–74 gal rated |
| Smart Solar SSG2-ES xxSmart Solar Electric Heating | 3 | 3 | 65–120 gal rated |
| Vaughn Thermal MPxxFHPTVaughn Thermal | 3 | 3 | 55–119 gal rated |
| Bradford White RE2H50S-Bradford White | 1 | 2 | 45 gal rated |
| Gree GRS-3.0Pd/TDxxGANhA-DGree Electric Appliances Inc. of Zhuhai | 2 | 2 | 55–68 gal rated |
| Carnot Labs N51Carnot Labs | 1 | 1 | 47 gal rated |
| Gas tankless water heaters18 lines, 367 model numbers | |||
| Rheem ECOHSxxINRheem Sales Company, Kiturami and Navien | 3 | 71 | 4.6–5.8 gal/min |
| A. O. Smith ATHR-xxM 1A.O. Smith | 3 | 62 | 4.8–5.9 gal/min |
| A. O. Smith ACT-199O-N 1A.O. Smith | 1 | 51 | 5.8 gal/min |
| A. O. Smith ATI-340H 1A.O. Smith | 1 | 40 | 5.4 gal/min |
| A. O. Smith ATO-240H 1A.O. Smith | 1 | 26 | 4.7 gal/min |
| A. O. Smith ATM-xxM-N 1A.O. Smith | 2 | 25 | 4.1–6.0 gal/min |
| Midea JSGxx-xxPCH-LPMidea America and HVAC Distributing | 3 | 22 | 4.4–5.7 gal/min |
| Noritz EZxxDV (GQ-CxxWX-FF US)Noritz America and Rinnai America | 5 | 15 | 4.7–5.6 gal/min |
| Bradford White RTGR150N1Kiturami | 1 | 12 | 4.3 gal/min |
| Bosch T9800 SE xxBosch Thermotechnology | 2 | 11 | 4.6–5.4 gal/min |
| Rinnai (CXxxI) REU-NBxxFFC-USRinnai America | 2 | 8 | 4.6–5.8 gal/min |
| Vesta gas tankless heatersVesta.DS. | 5 | 6 | 4.6–6.0 gal/min |
| Kepler gas tankless heatersAzure Canada and Salt Lake Iron & Steel | 2 | 4 | 5.2–5.7 gal/min |
| Midea MGWH150IXNNMidea America | 1 | 4 | 4.4 gal/min |
| Navien NPE-xxA2Navien and Vesta.DS. | 3 | 4 | 4.3–5.6 gal/min |
| Noritz NRCR92DV (GQ-CxxWXQ-FF US)Noritz America | 2 | 3 | 4.7–4.9 gal/min |
| Navien NPE-xxS2Navien | 2 | 2 | 4.4–5.3 gal/min |
| Rinnai (RX130I) REU-NB2024FF-USRinnai America | 1 | 1 | 3.8 gal/min |
| Gas storage water heaters9 lines, 134 model numbers | |||
| Rheem ECE Gxx-50U CN HERheem Sales Company | 2 | 38 | 40–50 gal rated |
| A. O. Smith GC6-PSxxV 1A.O. Smith | 2 | 32 | 38–49 gal rated |
| Rheem ECE G50-xxU CN HE EC3Rheem Sales Company | 2 | 18 | 50 gal rated |
| A. O. Smith GDHE-xx 3Lochinvar | 2 | 10 | 49–74 gal rated |
| A. O. Smith HDHE-xx 4Lochinvar | 2 | 10 | 49–74 gal rated |
| Rheem PROPG75-100P RH HE EC3Rheem Sales Company | 1 | 10 | 75 gal rated |
| GSW 6G5076NVC 1Lochinvar | 1 | 6 | 48 gal rated |
| HTP PHxx-xxAriston USA | 6 | 6 | 48–112 gal rated |
| American PG10 34 100 2V 2A.O. Smith | 1 | 4 | 33 gal rated |
| Solar water heating systems7 lines, 23 model numbers | |||
| GREENoneTEC solar systemsGREENoneTEC Solarindustrie | 5 | 5 | 22.3–44.6 sq ft collector |
| AET solar systemsAlternate Energy Technologies | 4 | 4 | 40.6–65.3 sq ft collector |
| Rheem solar systemsRheem-Ruud Manufacturing | 4 | 4 | 24.7–82 sq ft collector |
| Heliodyne solar systemsHeliodyne | 3 | 3 | 27–40.3 sq ft collector |
| Sammler solar systemsSAMMLER B. Michalopoulos AEBE (SAMMLER) | 3 | 3 | 27.1–45.4 sq ft collector |
| SunEarth solar systemsSunEarth | 2 | 2 | 26.9–41 sq ft collector |
| Universal Solar Products solar systemsUniversal Solar Products | 2 | 2 | 53.9–71.9 sq ft collector |