LG Inverter Heat Pump 80 Gal
#5 in 80 GallonFull review
The pick for a cold garage or basement: its heat pump keeps working in rooms down to 23 °F. Sold through LG’s HVAC dealers.
The LG Inverter Heat Pump 80 Gal is the better heat pump water heater overall, rated 3.7 to 2.9. The LG Inverter Heat Pump 80 Gal leads on efficiency and cold rooms. The A.O. Smith Voltex 120V 80 Gal wins on warranty.
A.O. Smith Voltex 120V 80 Gal
#16 in 80 GallonFull review
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.
Lowe's $3,098$3,098
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 LG Inverter Heat Pump 80 Gal for efficiency (3.90 UEF vs 3.00 UEF) and cold rooms (heat pump runs down to 23 °F room air vs heat pump runs down to 37 °F room air).
- Choose the A.O. Smith Voltex 120V 80 Gal for warranty (10-year tank, 10-year parts, 1-year labor vs 10-year tank, 1-year parts).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 80 gallon heat pump water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | LG Inverter Heat Pump 80 Gal | A.O. Smith Voltex 120V 80 Gal |
|---|---|---|
| Overall rating | 3.7/5 | 2.9/5 |
| Efficiency 35% | 64 3.90 UEF | 0 3.00 UEF |
| Hot water 20% | 76 94 gallons in the first hour | 72 93 gallons in the first hour |
| Warranty 20% | 30 10-year tank, 1-year parts | 75 10-year tank, 10-year parts, 1-year labor |
| Cold rooms 15% | 88 heat pump runs down to 23 °F room air | 32 heat pump runs down to 37 °F room air |
| Noise 10% | 50 noise not published (neutral score used) | 69 45 dB(A) |
Specifications
| LG Inverter Heat Pump 80 Gal | A.O. Smith Voltex 120V 80 Gal | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 80 gal | 80 gal |
| Tank volume (measured) | 72 gal | 82 gal |
| Uniform Energy Factor | 3.90 | 3.00 |
| First-hour rating | 94 gal | 93 gal |
| Draw pattern | High | High |
| Yearly energy use | 1,272 kWh | 1,654 kWh |
| Heat pump cut-off (low) | 23 °F | 37 °F |
| Sound level | - | 45 dB(A) |
| ENERGY STAR ID | 2682263 | 2546244 |
| Installation | ||
| Power | 240 V | Plug-in 120 V |
| Circuit | 30 A, 208/240 V | Shared 15 A circuit |
| Backup element | 5,000 W | 900 W |
| Operating air range | 23 to 120 °F | 37 to 120 °F |
| Minimum room size | 700 cu ft | 450 cu ft |
| Size | 62.7 in tall, 19.7 in across | 92 in tall, 27 in across |
| Weight | 224 lb | 307 lb |
| Refrigerant | R-134a | R-513A |
| Features | ||
| Wi-Fi | Built in | Built in |
| App | LG ThinQ | A. O. Smith (iCOMM) |
| Demand response port (CTA-2045) | - | Yes |
| Leak detection | - | Yes |
| Modes | Auto, Turbo, Heat Pump, Vacation | Heat Pump, Electric, Vacation |
| Warranty and models | ||
| Warranty | 10 yr tank, 1 yr parts | 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 | 2023-04 | 2023-07 |