Noritz ME50HPT-CN 50-Gallon vs Rinnai REHP80 80-Gallon (REHP80C)
The Rinnai REHP80 80-Gallon (REHP80C) is the more efficient unit: UEF 4 versus 3.46 — about 14% 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 $208/year for the Rinnai REHP80 80-Gallon (REHP80C) — a $49 annual difference. The Rinnai REHP80 80-Gallon (REHP80C) delivers more hot water in the peak hour (91 gal first-hour rating vs 58 gal).
| Noritz ME50HPT-CN 50-Gallon | Rinnai REHP80 80-Gallon (REHP80C) | |
|---|---|---|
| Uniform Energy Factor (UEF) | 3.46 | 4 |
| Fuel | Electric | Electric |
| First-hour rating | 58 gal | 91 gal |
| Rated storage volume | 47 gal | 75 gal |
| Draw pattern | Medium | High |
| Annual electricity use | 938 kWh/yr | 1225 kWh/yr |
| Heat pump type | 240 Volt Integrated HPWH | 240 Volt Integrated HPWH |
| Input voltage | 240 | 240 |
| Max current draw | 23 A | 24 A |
| Recovery efficiency | 373 % | 454 % |
| Smart / connected capable | No | No |
| Refrigerant (GWP) | R-134a (GWP:1430) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 35 °F | 37.4 °F |
| Height | 58.3 in | 74.2 in |
| Diameter | 28 in | 25.7 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Noritz ME50HPT-CN 50-Gallon or the Rinnai REHP80 80-Gallon (REHP80C)?
The Noritz ME50HPT-CN 50-Gallon: about $159/year versus $208/year for the Rinnai REHP80 80-Gallon (REHP80C) at national average rates — a $49 annual difference.
Are the Noritz ME50HPT-CN 50-Gallon and Rinnai REHP80 80-Gallon (REHP80C) both ENERGY STAR certified?
Yes — every water heater in this database is drawn from the U.S. EPA ENERGY STAR certified water heater datasets.