Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15)
Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) is a heat pump (hybrid electric) water heater from Rheem with a 36 gallon rated tank and a 46 gallon first-hour rating at a 3.45 UEF.
| Uniform Energy Factor (UEF) | 3.45 |
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| Annual electricity use | 643 kWh/yr |
| Recovery efficiency | 432 % |
| Fuel | Electric |
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| First-hour rating | 46 gal |
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| Rated storage volume | 36 gal |
| Draw pattern | Low |
| Heat pump type | 240 Volt Integrated HPWH |
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| Refrigerant (GWP) | R-134a (GWP:1430) |
| Compressor low-temp cutoff | 37 °F |
| Input voltage | 240 |
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| Max current draw | 12 A |
| Smart / connected capable | No |
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| Height | 62.3 in |
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| Diameter | 20.3 in |
| ENERGY STAR certified | Yes |
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Who is the Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) for?
- Its 46 gallon first-hour rating suits a household of 1–2 people under DOE sizing guidance.
- Estimated running cost: about $109/year at the national average electricity rate (643 kWh/yr certified use).
- Needs a 240 V circuit; at 12 A max draw plan for a 15 A breaker (NEC 125% continuous-load rule).
- The heat pump compressor operates down to 37 °F ambient — below that, backup elements take over.
Similar water heaters
- Friedrich Heat Pump 40-Gallon (PROH40 T2 FD400-15) (UEF 3.45)
- GE Profile Heat Pump 40-Gallon (PF40S10FPY01) (UEF 3.1)
- Rheem Heat Pump 40-Gallon (PROPH40 T2 RH375-15) (UEF 3.45)
- Rheem Heat Pump 40-Gallon (XE40T10H22U0) (UEF 3.45)
- Rheem Heat Pump 40-Gallon (XE40T10H22U1) (UEF 3.45)
- Richmond Heat Pump 40-Gallon (10E40-HP515) (UEF 3.45)
Frequently asked questions
Is the Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) ENERGY STAR certified?
Yes, the Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) holds a current ENERGY STAR certification for water heating efficiency (UEF 3.45).
How much does the Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) cost to run per year?
About $109 per year at national average energy rates, based on its certified annual energy use under the DOE test draw pattern. Your rate and usage change this figure.
What electrical circuit does the Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) need?
The Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) runs on a 240 V circuit drawing up to 12 A; per the NEC 125% continuous-load rule plan for at least a 15 A breaker (check the installation manual for the required circuit).
Is the Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) a smart water heater?
No, the Rheem Heat Pump 40-Gallon (PROPH40 T2 RH400-15) is not connected-capable — it has no app connectivity or demand-response support.
Sources
- data.energystar.gov (retrieved 2026-07-17)