Friedrich Heat Pump 40-Gallon (PROH50 T2 FD400-30) vs Navien NWP500 40-Gallon
The Friedrich Heat Pump 40-Gallon (PROH50 T2 FD400-30) is the more efficient unit: UEF 3.88 versus 3.85 — about 1% less energy for the same hot water. At national average rates that works out to about $143/year for the Navien NWP500 40-Gallon against $144/year for the Friedrich Heat Pump 40-Gallon (PROH50 T2 FD400-30) — a $1 annual difference. The Friedrich Heat Pump 40-Gallon (PROH50 T2 FD400-30) delivers more hot water in the peak hour (67 gal first-hour rating vs 65 gal).
| Friedrich Heat Pump 40-Gallon (PROH50 T2 FD400-30) | Navien NWP500 40-Gallon | |
|---|---|---|
| Uniform Energy Factor (UEF) | 3.88 | 3.85 |
| Fuel | Electric | Electric |
| First-hour rating | 67 gal | 65 gal |
| Rated storage volume | 45 gal | 44 gal |
| Draw pattern | Medium | Medium |
| Annual electricity use | 846 kWh/yr | 840 kWh/yr |
| Heat pump type | 240 Volt Integrated HPWH | 240 Volt Integrated HPWH |
| Input voltage | 240 | 240 |
| Max current draw | 21 A | 23 A |
| Recovery efficiency | 430 % | 461 % |
| Smart / connected capable | No | No |
| Refrigerant (GWP) | R-134a (GWP:1430) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 37 °F | 41 °F |
| Height | 61.8 in | 63 in |
| Diameter | 22.3 in | 21.8 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Friedrich Heat Pump 40-Gallon (PROH50 T2 FD400-30) or the Navien NWP500 40-Gallon?
The Navien NWP500 40-Gallon: about $143/year versus $144/year for the Friedrich Heat Pump 40-Gallon (PROH50 T2 FD400-30) at national average rates — a $1 annual difference.
Are the Friedrich Heat Pump 40-Gallon (PROH50 T2 FD400-30) and Navien NWP500 40-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.