Quick verdict
What your current unit costs to operate
Based on U.S. average energy rates (EIA). UEF 0.93.
Replacement options
Rheem PROPH50 T2 RH400-30
Heat PumpUEF 3.88 / ~$146/yr / 10-yr tank warranty
Electric tank to heat pump, same brand, same electrical circuit, UEF jumps from 0.93 to 3.88
- 30A breaker needed (currently 25A)
- Needs condensate drain (your current unit does not)
- 3.1" taller than your current unit
- 2.0" wider than your current unit
A. O. Smith HPTS-50-2
Heat PumpUEF 3.80 / ~$143/yr / 10-yr tank warranty
Electric tank to A.O. Smith heat pump, UEF jumps from 0.93 to 3.80
- 30A breaker needed (currently 25A)
- Needs condensate drain (your current unit does not)
- 4.4" taller than your current unit
Navien NWP500S050AUMB
Heat PumpUEF 3.85 / ~$145/yr / 10-yr tank warranty
Electric tank to Navien heat pump, UEF jumps from 0.93 to 3.85
- 30A breaker needed (currently 25A)
- Needs condensate drain (your current unit does not)
- 4.4" taller than your current unit
Rinnai REHP50BM
Heat PumpUEF 3.75 / ~$146/yr / 10-yr tank warranty
Electric tank to Rinnai heat pump, UEF jumps from 0.93 to 3.75
- 30A breaker needed (currently 25A)
- Needs condensate drain (your current unit does not)
- 7.8" taller than your current unit
Bradford White RE2H50S
Heat PumpUEF 3.44 / ~$163/yr / 10-yr tank warranty
Electric tank to Bradford White heat pump, UEF jumps from 0.93 to 3.44
- 30A breaker needed (currently 25A)
Noritz NHP50
Heat PumpUEF 3.46 / ~$162/yr / 10-yr tank warranty
Electric tank to Noritz heat pump, UEF jumps from 0.93 to 3.46
- 30A breaker needed (currently 25A)
- 7.8" wider than your current unit
Replacement comparison
| Spec | Your unit | PROPH50 T2 RH400-30 | HPTS-50-2 | NWP500S050AUMB | REHP50BM | RE2H50S | NHP50 |
|---|---|---|---|---|---|---|---|
| UEF | 0.93 | 3.88 | 3.80 | 3.85 | 3.75 | 3.44 | 3.46 |
| Annual Cost | $607/yr | $146/yr | $143/yr | $145/yr | $146/yr | $163/yr | $162/yr |
| Annual Savings | $461/yr | $464/yr | $462/yr | $461/yr | $444/yr | $445/yr | |
| Height | 58.6" | 61.8" | 63" | 63" | 66.4" | 59.2" | 58.3" |
| Width | 20.2" | 22.2" | 22" | 21.7" | 21.7" | 21.8" | 28.0" |
| Warranty | 6 yr | 10 yr | 10 yr | 10 yr | 10 yr | 10 yr | 10 yr |
● Best value in each row. Your unit column shows the model being replaced.
Install considerations: electric tank to heat pump
Items your installer may need. Actual requirements depend on your existing setup, local code, and jurisdiction.
The federal tax credit of up to $2,000 under IRA Section 25C expired December 31, 2025. State and utility rebates may still apply.