Navien NWP500 65-Gallon vs Navien NWP500 80-Gallon
The Navien NWP500 80-Gallon is the more efficient unit: UEF 4.05 versus 4.03 — about 0% 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 $215/year for the Navien NWP500 80-Gallon — a $3 annual difference. The Navien NWP500 80-Gallon delivers more hot water in the peak hour (85 gal first-hour rating vs 80 gal).
| Navien NWP500 65-Gallon | Navien NWP500 80-Gallon | |
|---|---|---|
| Uniform Energy Factor (UEF) | 4.03 | 4.05 |
| Fuel | Electric | Electric |
| First-hour rating | 80 gal | 85 gal |
| Rated storage volume | 61 gal | 74 gal |
| Draw pattern | High | High |
| Annual electricity use | 1245 kWh/yr | 1265 kWh/yr |
| Heat pump type | 240 Volt Integrated HPWH | 240 Volt Integrated HPWH |
| Input voltage | 240 | 240 |
| Max current draw | 23 A | 23 A |
| Recovery efficiency | 433 % | 453 % |
| Smart / connected capable | No | No |
| Refrigerant (GWP) | R-134a (GWP:1430) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 41 °F | 41 °F |
| Height | 63 in | 71.6 in |
| Diameter | 25 in | 25 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Navien NWP500 65-Gallon or the Navien NWP500 80-Gallon?
The Navien NWP500 65-Gallon: about $212/year versus $215/year for the Navien NWP500 80-Gallon at national average rates — a $3 annual difference.
Are the Navien NWP500 65-Gallon and Navien NWP500 80-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.