Navien NWP500 80-Gallon vs Noritz ME50HPT-CN 50-Gallon
The Navien NWP500 80-Gallon is the more efficient unit: UEF 4.05 versus 3.46 — about 15% less energy for the same hot water. At national average rates that works out to about $159/year for the Noritz ME50HPT-CN 50-Gallon against $215/year for the Navien NWP500 80-Gallon — a $56 annual difference. The Navien NWP500 80-Gallon delivers more hot water in the peak hour (85 gal first-hour rating vs 58 gal).
| Navien NWP500 80-Gallon | Noritz ME50HPT-CN 50-Gallon | |
|---|---|---|
| Uniform Energy Factor (UEF) | 4.05 | 3.46 |
| Fuel | Electric | Electric |
| First-hour rating | 85 gal | 58 gal |
| Rated storage volume | 74 gal | 47 gal |
| Draw pattern | High | Medium |
| Annual electricity use | 1265 kWh/yr | 938 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 | 453 % | 373 % |
| Smart / connected capable | No | No |
| Refrigerant (GWP) | R-134a (GWP:1430) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 41 °F | 35 °F |
| Height | 71.6 in | 58.3 in |
| Diameter | 25 in | 28 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Navien NWP500 80-Gallon or the Noritz ME50HPT-CN 50-Gallon?
The Noritz ME50HPT-CN 50-Gallon: about $159/year versus $215/year for the Navien NWP500 80-Gallon at national average rates — a $56 annual difference.
Are the Navien NWP500 80-Gallon and Noritz ME50HPT-CN 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.