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 3.5. The Rinnai REHP50 leads on hot water. The Bradford White AeroTherm 50 Gal wins on efficiency.
Bradford White AeroTherm 50 Gal
#6 in 40–50 GallonFull review
Bradford White’s second-generation hybrid, sold and installed through plumbers, with a 10-year tank and parts warranty and a port for utility demand-response programs.
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 hot water (73 gallons in the first hour vs 65 gallons in the first hour).
- Choose the Bradford White AeroTherm 50 Gal for efficiency (3.89 UEF vs 3.75 UEF).
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 | Bradford White AeroTherm 50 Gal |
|---|---|---|
| Overall rating | 3.6/5 | 3.5/5 |
| Efficiency 35% | 54 3.75 UEF | 64 3.89 UEF |
| Hot water 20% | 92 73 gallons in the first hour | 60 65 gallons in the first hour |
| Warranty 20% | 75 10-year tank, 10-year parts, 1-year labor | 70 10-year tank, 10-year parts |
| Cold rooms 15% | 30 heat pump runs down to 37.4 °F room air | 32 heat pump runs down to 37 °F room air |
| Noise 10% | 44 49 dB(A) | 50 noise not published (neutral score used) |
Specifications
| Rinnai REHP50 | Bradford White AeroTherm 50 Gal | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 50 gal | 50 gal |
| Tank volume (measured) | 46 gal | 45 gal |
| Uniform Energy Factor | 3.75 | 3.89 |
| First-hour rating | 73 gal | 65 gal |
| Draw pattern | Medium | Medium |
| Yearly energy use | 844 kWh | 835 kWh |
| Heat pump cut-off (low) | 37.4 °F | 37 °F |
| Sound level | 49 dB(A) | - |
| ENERGY STAR ID | 3531243 | 4439734 |
| Installation | ||
| Power | 240 V | 240 V |
| Circuit | 30 A, 208/240 V | 25 A, 208/240 V |
| Backup element | 4,500 W | 4,000 W |
| Operating air range | 37 to 107 °F | 37 to 120 °F |
| Minimum room size | 700 cu ft | 700 cu ft |
| Size | 66.4 in tall, 21.7 in across | 46.1 in tall, 18 in across |
| Weight | 218 lb | - |
| Refrigerant | R-134a | R-134a |
| Features | ||
| Wi-Fi | No | Built in |
| App | - | Bradford White Wave |
| Leak detection | No | - |
| Modes | Economy, Heat Pump, Hybrid, E-Heater, Vacation | Heat Pump, Hybrid Standard, Hybrid Plus, Electric, Vacation |
| Warranty and models | ||
| Warranty | 10 yr tank, 10 yr parts, 1 yr labor | 10 yr tank, 10 yr parts |
| Also sold as | - | Jetglas RE2HP5010-1NCTT |
| Released | 2024-08 | 2025-07 |