Rinnai REHP50
#4 in 40–50 GallonFull review
A Midea-built heater with Rinnai’s support network and one of the few listings on Amazon. Check the seller is a Rinnai-authorized dealer before buying.
Amazon $1,799 Lowe's $1,799$1,799
The Rinnai REHP50 is the better heat pump water heater overall, rated 3.6 to 3.0. The Rinnai REHP50 leads on efficiency and hot water. The GE Profile 50 Gal 120V wins on noise and cold rooms. The Rinnai REHP50 costs $840.97 less ($1,799 vs $2,639.97).
GE Profile 50 Gal 120V
#18 in 40–50 GallonFull review
The most efficient 120 V plug-in here, and the quietest, for replacing a gas tank without new wiring. It can be rewired for 240 V later if the household outgrows it.
GE Appliances PC Richard $2,639.97$2,639.97
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 Rinnai REHP50 for efficiency (3.75 UEF vs 3.20 UEF) and hot water (73 gallons in the first hour vs 59 gallons in the first hour).
- Choose the GE Profile 50 Gal 120V for noise (41 dB(A) vs 49 dB(A)) and cold rooms (heat pump runs down to 35 °F room air vs heat pump runs down to 37.4 °F room air).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 40–50 gallon heat pump water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rinnai REHP50 | GE Profile 50 Gal 120V |
|---|---|---|
| Overall rating | 3.6/5 | 3.0/5 |
| Efficiency 35% | 54 3.75 UEF | 14 3.20 UEF |
| Hot water 20% | 92 73 gallons in the first hour | 36 59 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% | 30 heat pump runs down to 37.4 °F room air | 40 heat pump runs down to 35 °F room air |
| Noise 10% | 44 49 dB(A) | 94 41 dB(A) |
Specifications
| Rinnai REHP50 | GE Profile 50 Gal 120V | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 50 gal | 50 gal |
| Tank volume (measured) | 46 gal | 50 gal |
| Uniform Energy Factor | 3.75 | 3.20 |
| First-hour rating | 73 gal | 59 gal |
| Draw pattern | Medium | Medium |
| Yearly energy use | 844 kWh | 1,015 kWh |
| Heat pump cut-off (low) | 37.4 °F | 35 °F |
| Sound level | 49 dB(A) | 41 dB(A) |
| ENERGY STAR ID | 3531243 | 4016268 |
| Installation | ||
| Power | 240 V | Plug-in 120 V |
| Circuit | 30 A, 208/240 V | Shared 15 A circuit |
| Backup element | 4,500 W | 900 W |
| Operating air range | 37 to 107 °F | 35 to 120 °F |
| Minimum room size | 700 cu ft | 700 cu ft |
| Size | 66.4 in tall, 21.7 in across | 48.1 in tall, 18.5 in across |
| Weight | 218 lb | 179 lb |
| Refrigerant | R-134a | R1234YF |
| Features | ||
| Wi-Fi | No | Built in |
| App | - | SmartHQ |
| Demand response port (CTA-2045) | - | Yes |
| Leak detection | No | Yes |
| Modes | Economy, Heat Pump, Hybrid, E-Heater, Vacation | Heat Pump, Hybrid, 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 | 2024-08 | 2025-05 |