AMERICAN STANDARD WATER HEATERS Heat Pump Water Heater 40-Gallon (ASHPWH-50) vs Rinnai REHP50 50-Gallon
Both water heaters carry the same efficiency rating: UEF 3.75. At national average rates that works out to about $143/year for the Rinnai REHP50 50-Gallon against $147/year for the AMERICAN STANDARD WATER HEATERS Heat Pump Water Heater 40-Gallon (ASHPWH-50) — a $4 annual difference. The Rinnai REHP50 50-Gallon delivers more hot water in the peak hour (73 gal first-hour rating vs 68 gal). Only the AMERICAN STANDARD WATER HEATERS Heat Pump Water Heater 40-Gallon (ASHPWH-50) is connected-capable (app control, utility programs).
| AMERICAN STANDARD WATER HEATERS Heat Pump Water Heater 40-Gallon (ASHPWH-50) | Rinnai REHP50 50-Gallon | |
|---|---|---|
| Price (MSRP) | $1,991.85 | — |
| Uniform Energy Factor (UEF) | 3.75 | 3.75 |
| Fuel | Electric | Electric |
| First-hour rating | 68 gal | 73 gal |
| Rated storage volume | 45 gal | 46 gal |
| Draw pattern | Medium | Medium |
| Annual electricity use | 867 kWh/yr | 844 kWh/yr |
| Heat pump type | 240 Volt Integrated HPWH | 240 Volt Integrated HPWH |
| Input voltage | 240 | 240 |
| Max current draw | 21 A | 24 A |
| Recovery efficiency | 430 % | 465 % |
| Smart / connected capable | Yes | No |
| Refrigerant (GWP) | R-134a (GWP:1430) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 35 °F | 37.4 °F |
| Height | 45.8 in | 66.4 in |
| Diameter | 18.2 in | 21.7 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the AMERICAN STANDARD WATER HEATERS Heat Pump Water Heater 40-Gallon (ASHPWH-50) or the Rinnai REHP50 50-Gallon?
The Rinnai REHP50 50-Gallon: about $143/year versus $147/year for the AMERICAN STANDARD WATER HEATERS Heat Pump Water Heater 40-Gallon (ASHPWH-50) at national average rates — a $4 annual difference.
Are the AMERICAN STANDARD WATER HEATERS Heat Pump Water Heater 40-Gallon (ASHPWH-50) and Rinnai REHP50 50-Gallon both ENERGY STAR certified?
Yes — every water heater in this database is drawn from the U.S. EPA ENERGY STAR certified water heater datasets.