Navien NWP500 80 Gal
#13 in 80 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.
2.9/5
A 120 V plug-in with a backup element and leak shut-off included. Its certified efficiency is among the lowest here, so it suits replacing a gas tank more than replacing an electric one.
- 80 galSize
- 3.00UEF
- 93 galFirst hour
- Plug-in 120 VPower
- 37 °FRuns down to
- 10 yr tankWarranty
Check price at Lowe's$3,098
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Comes with a leak sensor and automatic shut-off valve
- Plugs into a standard 120 V outlet, so it can replace a gas tank without a new 240 V circuit
- Built-in Wi-Fi: set schedules and vacation mode from the A. O. Smith (iCOMM) app
Cons
- Lower efficiency than 240 V models: a certified UEF of 3.00
- Switches to the backup element when the room drops below 37 °F, so it saves little in a freezing garage
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | HPTV-80 |
|---|---|
| Ratings (ENERGY STAR) | |
| Size (nominal) | 80 gal |
| Tank volume (measured) | 82 gal |
| Uniform Energy Factor | 3.00 |
| First-hour rating | 93 gal |
| Draw pattern | High |
| Yearly energy use | 1,654 kWh |
| Heat pump cut-off (low) | 37 °F |
| Sound level | 45 dB(A) |
| ENERGY STAR ID | 2546244 |
| Installation | |
| Power | Plug-in 120 V |
| Circuit | Shared 15 A circuit |
| Backup element | 900 W |
| Operating air range | 37 to 120 °F |
| Minimum room size | 450 cu ft |
| Size | 92 in tall, 27 in across |
| Weight | 307 lb |
| Refrigerant | R-513A |
| Features | |
| Wi-Fi | Built in |
| App | A. O. Smith (iCOMM) |
| Demand response port (CTA-2045) | Yes |
| Leak detection | Yes |
| Modes | Heat Pump, Electric, Vacation |
| Warranty and models | |
| Warranty | 10 yr tank, 10 yr parts, 1 yr labor |
| Also sold as | American HPV10280H009DV, Lochinvar HPV080KD, Reliance 10-80-DHPTV, State HPVX-80-DHPT |
| Released | 2023-07 |
Alternatives in this size
Rheem ProTerra 15 A 80 Gal
#14 in 80 GallonFull review
The ProTerra for a home that only has a 15 A, 240 V circuit, such as one left by a small electric tank: it avoids rewiring but gives up some efficiency and first-hour delivery.
Rheem ProTerra Plug-in 80 Gal
#15 in 80 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 $2,798$2,798
Compare
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