Quick verdict
What your current unit costs to operate
Based on U.S. average energy rates (EIA). UEF 4.00.
Replacement options
Rheem PROPH80 T2 RH400-30
Heat PumpUEF 4.07 / ~$209/yr / 10-yr tank warranty
UEF 4.07 vs 4.00, Wi-Fi included, taller at 74.19 vs 51.1 inches
- 30A dedicated breaker needed
- 23.1" taller than your current unit
- 2.2" wider than your current unit
Navien NWP500S080AUMB
Heat PumpUEF 4.05 / ~$218/yr / 10-yr tank warranty
UEF 4.05 vs 4.00, Wi-Fi and 45 dBA noise, taller at 71.6 vs 51.1 inches
- 30A dedicated breaker needed
- Needs condensate drain (your current unit does not)
- 20.5" taller than your current unit
- 3.0" wider than your current unit
A. O. Smith HPTS-80-2
Heat PumpUEF 3.88 / ~$220/yr / 10-yr tank warranty
UEF 3.88, Wi-Fi and 45 dBA noise, taller at 69 vs 51.1 inches
- 30A dedicated breaker needed
- Needs condensate drain (your current unit does not)
- 17.9" taller than your current unit
- 4.5" wider than your current unit
Rinnai REHP80BM
Heat PumpUEF 4.00 / ~$211/yr / 10-yr tank warranty
UEF 4.00 matches, Wi-Fi included, taller at 74.2 vs 51.1 inches
- 30A dedicated breaker needed
- 23.1" taller than your current unit
- 3.6" wider than your current unit
Replacement comparison
| Spec | Your unit | PROPH80 T2 RH400-30 | NWP500S080AUMB | HPTS-80-2 | REHP80BM |
|---|---|---|---|---|---|
| UEF | 4.00 | 4.07 | 4.05 | 3.88 | 4.00 |
| Annual Cost | $214/yr | $209/yr | $218/yr | $220/yr | $211/yr |
| Annual Savings | $5/yr | $-4/yr | $-6/yr | $3/yr | |
| Height | 51.1" | 74.2" | 71.6" | 69" | 74.2" |
| Width | 22.0" | 24.2" | 25" | 26.5" | 25.6" |
| 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.