American Heat Pump 80-Gallon (HPA10280H045DV 2) vs Navien NWP500 65-Gallon
The Navien NWP500 65-Gallon is the more efficient unit: UEF 4.03 versus 3.88 — about 4% less energy for the same hot water. At national average rates that works out to about $212/year for the Navien NWP500 65-Gallon against $217/year for the American Heat Pump 80-Gallon (HPA10280H045DV 2) — a $5 annual difference. The American Heat Pump 80-Gallon (HPA10280H045DV 2) delivers more hot water in the peak hour (95 gal first-hour rating vs 80 gal). Only the American Heat Pump 80-Gallon (HPA10280H045DV 2) is connected-capable (app control, utility programs).
| American Heat Pump 80-Gallon (HPA10280H045DV 2) | Navien NWP500 65-Gallon | |
|---|---|---|
| Uniform Energy Factor (UEF) | 3.88 | 4.03 |
| Fuel | Electric | Electric |
| First-hour rating | 95 gal | 80 gal |
| Rated storage volume | 81 gal | 61 gal |
| Draw pattern | High | High |
| Annual electricity use | 1279 kWh/yr | 1245 kWh/yr |
| Heat pump type | 240 Volt Integrated HPWH | 240 Volt Integrated HPWH |
| Input voltage | 240 | 240 |
| Max current draw | 22 A | 23 A |
| Recovery efficiency | 428 % | 433 % |
| Smart / connected capable | Yes | No |
| Refrigerant (GWP) | R-134a (GWP:1430) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 37 °F | 41 °F |
| Height | 69 in | 63 in |
| Diameter | 27 in | 25 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the American Heat Pump 80-Gallon (HPA10280H045DV 2) or the Navien NWP500 65-Gallon?
The Navien NWP500 65-Gallon: about $212/year versus $217/year for the American Heat Pump 80-Gallon (HPA10280H045DV 2) at national average rates — a $5 annual difference.
Are the American Heat Pump 80-Gallon (HPA10280H045DV 2) and Navien NWP500 65-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.