Lochinvar Heat Pump 65-Gallon (HPPA065KD 2) vs Navien NWP500 80-Gallon
The Navien NWP500 80-Gallon is the more efficient unit: UEF 4.05 versus 3.84 — about 5% less energy for the same hot water. At national average rates that works out to about $215/year for the Navien NWP500 80-Gallon against $220/year for the Lochinvar Heat Pump 65-Gallon (HPPA065KD 2) — a $5 annual difference. The Navien NWP500 80-Gallon delivers more hot water in the peak hour (85 gal first-hour rating vs 83 gal). Only the Lochinvar Heat Pump 65-Gallon (HPPA065KD 2) is connected-capable (app control, utility programs).
| Lochinvar Heat Pump 65-Gallon (HPPA065KD 2) | Navien NWP500 80-Gallon | |
|---|---|---|
| Uniform Energy Factor (UEF) | 3.84 | 4.05 |
| Fuel | Electric | Electric |
| First-hour rating | 83 gal | 85 gal |
| Rated storage volume | 68 gal | 74 gal |
| Draw pattern | High | High |
| Annual electricity use | 1292 kWh/yr | 1265 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 | 435 % | 453 % |
| Smart / connected capable | Yes | No |
| Refrigerant (GWP) | R-134a (GWP:1430) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 37 °F | 41 °F |
| Height | 61 in | 71.6 in |
| Diameter | 23 in | 25 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Lochinvar Heat Pump 65-Gallon (HPPA065KD 2) or the Navien NWP500 80-Gallon?
The Navien NWP500 80-Gallon: about $215/year versus $220/year for the Lochinvar Heat Pump 65-Gallon (HPPA065KD 2) at national average rates — a $5 annual difference.
Are the Lochinvar Heat Pump 65-Gallon (HPPA065KD 2) 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.