Quick verdict
What your current unit costs to operate
Based on U.S. average energy rates (EIA). UEF 3.80.
Replacement options
Rheem PROPH50 T2 RH400-30
Heat PumpUEF 3.88 / ~$146/yr / 10-yr tank warranty
UEF 3.88 vs 3.80, Wi-Fi included, slightly shorter at 61.75 vs 63 inches
Bradford White RE2HP50-1NCTT
Heat PumpUEF 3.89 / ~$144/yr / 10-yr tank warranty
Highest UEF in class at 3.89, compact 46.1-inch height vs 63 inches
- 16.9" shorter than your current unit
- 4.0" narrower than your current unit
Navien NWP500S050AUMB
Heat PumpUEF 3.85 / ~$145/yr / 10-yr tank warranty
UEF 3.85 vs 3.80, same 45 dBA noise level, Wi-Fi included
Rinnai REHP50BM
Heat PumpUEF 3.75 / ~$146/yr / 10-yr tank warranty
UEF 3.75, Wi-Fi included, 46-gal capacity matches, taller at 66.4 inches
- 3.4" taller than your current unit
Replacement comparison
| Spec | Your unit | PROPH50 T2 RH400-30 | RE2HP50-1NCTT | NWP500S050AUMB | REHP50BM |
|---|---|---|---|---|---|
| UEF | 3.80 | 3.88 | 3.89 | 3.85 | 3.75 |
| Annual Cost | $143/yr | $146/yr | $144/yr | $145/yr | $146/yr |
| Annual Savings | $-3/yr | $-1/yr | $-2/yr | $-3/yr | |
| Height | 63" | 61.8" | 46.1" | 63" | 66.4" |
| Width | 22" | 22.2" | 18.0" | 21.7" | 21.7" |
| Warranty | 10 yr | 10 yr | 10 yr | 10 yr | 10 yr |
● Best value in each row. Your unit column shows the model being replaced.
Common install considerations for heat pump units
What is required depends on your existing installation, local code, and installer preference.
The federal tax credit of up to $2,000 under IRA Section 25C expired December 31, 2025. State and utility rebates may still apply.