LG Inverter Heat Pump 80 Gal
#2 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 3.8 to 3.0. The LG Inverter Heat Pump 80 Gal leads on hot water, cold rooms and efficiency. The Rheem ProTerra 15 A 80 Gal wins on warranty.
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.
Prices were last checked October 22, 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 hot water (94 gallons in the first hour vs 67 gallons in the first hour), cold rooms (heat pump runs down to 23 °F room air vs heat pump runs down to 37 °F room air) and efficiency (3.90 UEF vs 3.70 UEF).
- Choose the Rheem ProTerra 15 A 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 | Rheem ProTerra 15 A 80 Gal |
|---|---|---|
| Overall rating | 3.8/5 | 3.0/5 |
| Efficiency 35% | 64 3.90 UEF | 50 3.70 UEF |
| Hot water 20% | 76 94 gallons in the first hour | 0 67 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% | 88 42 dB(A) | 69 45 dB(A) |
Specifications
| LG Inverter Heat Pump 80 Gal | Rheem ProTerra 15 A 80 Gal | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 80 gal | 80 gal |
| Tank volume (measured) | 72 gal | 72 gal |
| Uniform Energy Factor | 3.90 | 3.70 |
| First-hour rating | 94 gal | 67 gal |
| Draw pattern | High | Medium |
| Yearly energy use | 1,272 kWh | 871 kWh |
| Heat pump cut-off (low) | 23 °F | 37 °F |
| Sound level | 42 dB(A) | 45 dB(A) |
| ENERGY STAR ID | 2682263 | 3554236 |
| Installation | ||
| Power | 240 V | 240 V |
| Circuit | 30 A, 208/240 V | 15 A, 208/240 V |
| Backup element | 5,000 W | 2,250 W |
| Operating air range | 23 to 120 °F | 37 to 145 °F |
| Minimum room size | 700 cu ft | 700 cu ft |
| Size | 62.7 in tall, 19.7 in across | 74.2 in tall, 24.3 in across |
| Weight | 224 lb | 261 lb |
| Refrigerant | R-134a | R-134a |
| Features | ||
| Wi-Fi | Built in | Built in |
| App | LG ThinQ | EcoNet |
| Demand response port (CTA-2045) | - | Yes |
| Leak detection | - | No |
| Modes | Auto, Turbo, Heat Pump, Vacation | Energy Saver, Heat Pump, High Demand, Electric, Vacation |
| Warranty and models | ||
| Warranty | 10 yr tank, 1 yr parts | 10 yr tank, 10 yr parts, 1 yr labor |
| Also sold as | - | Friedrich PROH80 T2 FD400-15, Rheem PROPH80 T2 RH375-15, Rheem PROPH80 T2 RH400-15, Richmond 10E80-HP515, Richmond 10E80-HP5U15, Ruud PROUH80 T2 RU375-15, Ruud PROUH80 T2 RU400-15 |
| Released | 2023-04 | 2024-06 |