Midea Water Heater 80-Gallon (MAHW-80VN3A) vs Navien NWP500 80-Gallon
The Navien NWP500 80-Gallon is the more efficient unit: UEF 4.05 versus 4 — about 1% less energy for the same hot water. At national average rates that works out to about $211/year for the Midea Water Heater 80-Gallon (MAHW-80VN3A) against $215/year for the Navien NWP500 80-Gallon — a $4 annual difference. The Midea Water Heater 80-Gallon (MAHW-80VN3A) delivers more hot water in the peak hour (91 gal first-hour rating vs 85 gal). Only the Midea Water Heater 80-Gallon (MAHW-80VN3A) is connected-capable (app control, utility programs).
| Midea Water Heater 80-Gallon (MAHW-80VN3A) | Navien NWP500 80-Gallon | |
|---|---|---|
| Uniform Energy Factor (UEF) | 4 | 4.05 |
| Fuel | Electric | Electric |
| First-hour rating | 91 gal | 85 gal |
| Rated storage volume | 74 gal | 74 gal |
| Draw pattern | High | High |
| Annual electricity use | 1240 kWh/yr | 1265 kWh/yr |
| Heat pump type | 240 Volt Integrated HPWH | 240 Volt Integrated HPWH |
| Input voltage | 240 | 240 |
| Max current draw | 24 A | 23 A |
| Recovery efficiency | 450 % | 453 % |
| Smart / connected capable | Yes | No |
| Refrigerant (GWP) | R-134a (GWP:1430) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 37.4 °F | 41 °F |
| Height | 41.7 in | 71.6 in |
| Diameter | 21.8 in | 25 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Midea Water Heater 80-Gallon (MAHW-80VN3A) or the Navien NWP500 80-Gallon?
The Midea Water Heater 80-Gallon (MAHW-80VN3A): about $211/year versus $215/year for the Navien NWP500 80-Gallon at national average rates — a $4 annual difference.
Are the Midea Water Heater 80-Gallon (MAHW-80VN3A) 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.