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 is the better heat pump water heater overall, rated 3.7 to 2.6. The Navien NWP500 65 Gal leads on efficiency and hot water. The Rheem ProTerra Plug-in 65 Gal wins on cold rooms.
Rheem ProTerra Plug-in 65 Gal
#16 in 65 GallonFull review
A plug-in for replacing a gas tank in a mild-climate garage or basement without new wiring. Buy a size up, since it has no element to fall back on.
Home Depot $2,199$2,199
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.
Which should you buy?
- Choose the Navien NWP500 65 Gal for efficiency (4.03 UEF vs 3.12 UEF) and hot water (80 gallons in the first hour vs 63 gallons in the first hour).
- Choose the Rheem ProTerra Plug-in 65 Gal for cold rooms (heat pump runs down to 37 °F room air vs heat pump runs down to 41 °F room air).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 65 gallon heat pump water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Navien NWP500 65 Gal | Rheem ProTerra Plug-in 65 Gal |
|---|---|---|
| Overall rating | 3.7/5 | 2.6/5 |
| Efficiency 35% | 74 4.03 UEF | 9 3.12 UEF |
| Hot water 20% | 80 80 gallons in the first hour | 12 63 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 | 32 heat pump runs down to 37 °F room air |
| Noise 10% | 50 noise not published (neutral score used) | 50 noise not published (neutral score used) |
Specifications
| Navien NWP500 65 Gal | Rheem ProTerra Plug-in 65 Gal | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 65 gal | 65 gal |
| Tank volume (measured) | 61 gal | 59 gal |
| Uniform Energy Factor | 4.03 | 3.12 |
| First-hour rating | 80 gal | 63 gal |
| Draw pattern | High | Medium |
| Yearly energy use | 1,245 kWh | 971 kWh |
| Heat pump cut-off (low) | 41 °F | 37 °F |
| ENERGY STAR ID | 4015937 | 3555346 |
| Installation | ||
| Power | 240 V | Plug-in 120 V |
| Circuit | 30 A, 208/240 V | Shared 15 A or 20 A circuit |
| Backup element | 5,000 W | None |
| Operating air range | 41 to 113 °F | 37 to 145 °F |
| Minimum room size | 640 cu ft | 700 cu ft |
| Size | 63 in tall, 25 in across | 64.2 in tall, 24.3 in across |
| Weight | 204 lb | 225 lb |
| Refrigerant | R-134a | R-134a |
| Features | ||
| Wi-Fi | Built in | Built in |
| App | NaviLink | EcoNet |
| Demand response port (CTA-2045) | - | Yes |
| Leak detection | No | No |
| Modes | Energy Saver, Heat Pump, High Demand, Electric, Vacation | Heat Pump, Vacation |
| Warranty and models | ||
| Warranty | 10 yr tank, 10 yr parts, 1 yr labor | 10 yr tank, 10 yr parts, 1 yr labor |
| Also sold as | - | Friedrich PROH65 T0 FD120-M, Friedrich PROH65 T0 FD120-MSO, Rheem PROPH65 T0 RH120-M, Rheem PROPH65 T0 RH120-MSO, Richmond 10E65-HP120M, Richmond 10E65-HP120MS, Ruud PROUH65 T0 RU120-M, Ruud PROUH65 T0 RU120-MSO |
| Released | 2025-06 | 2022-04 |