Navien NWP500 65 Gal
#5 in 65 GallonFull review
Navien’s stainless-tank hybrid, sold through plumbers, with a 10-year warranty that includes a year of labor. Its heat pump stops below 41 °F room air, so it suits a basement more than a cold garage.
The Navien NWP500 65 Gal rates 3.7 among 65 gallon heat pump water heaters; the Navien NWP500 50 Gal rates 3.4 among 40–50 gallon ones.
Navien NWP500 50 Gal
#12 in 40–50 GallonFull review
Navien’s stainless-tank hybrid, sold through plumbers, with a 10-year warranty that includes a year of labor. Its heat pump stops below 41 °F room air, so it suits a basement more than a cold garage.
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different size classes (65 gallon and 40–50 gallon), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Navien NWP500 65 Gal | Navien NWP500 50 Gal |
|---|---|---|
| Overall rating | 3.7/5 | 3.4/5 |
| Efficiency 35% | 74 4.03 UEF | 61 3.85 UEF |
| Hot water 20% | 80 80 gallons in the first hour | 60 65 gallons in the first hour |
| Warranty 20% | 75 10-year tank, 10-year parts, 1-year labor | 75 10-year tank, 10-year parts, 1-year labor |
| Cold rooms 15% | 16 heat pump runs down to 41 °F room air | 16 heat pump runs down to 41 °F room air |
| Noise 10% | 50 noise not published (neutral score used) | 50 noise not published (neutral score used) |
Specifications
| Navien NWP500 65 Gal | Navien NWP500 50 Gal | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 65 gal | 50 gal |
| Tank volume (measured) | 61 gal | 44 gal |
| Uniform Energy Factor | 4.03 | 3.85 |
| First-hour rating | 80 gal | 65 gal |
| Draw pattern | High | Medium |
| Yearly energy use | 1,245 kWh | 840 kWh |
| Heat pump cut-off (low) | 41 °F | 41 °F |
| ENERGY STAR ID | 4015937 | 4015938 |
| Installation | ||
| Power | 240 V | 240 V |
| Circuit | 30 A, 208/240 V | 30 A, 208/240 V |
| Backup element | 5,000 W | 5,000 W |
| Operating air range | 41 to 113 °F | 41 to 113 °F |
| Minimum room size | 640 cu ft | 640 cu ft |
| Size | 63 in tall, 25 in across | 63 in tall, 21.8 in across |
| Weight | 204 lb | 181 lb |
| Refrigerant | R-134a | R-134a |
| Features | ||
| Wi-Fi | Built in | Built in |
| App | NaviLink | NaviLink |
| Leak detection | No | No |
| Modes | Energy Saver, Heat Pump, High Demand, Electric, Vacation | Energy Saver, Heat Pump, High Demand, Electric, Vacation |
| Warranty and models | ||
| Warranty | 10 yr tank, 10 yr parts, 1 yr labor | 10 yr tank, 10 yr parts, 1 yr labor |
| Released | 2025-06 | 2025-06 |