Appliances / Heat pump water heaters / Rheem
Rheem PRO H50 T2 RH310BM
45 gal · 240-volt integrated heat pump water heater · 2 colour/finish versions
Check the price at the store, then add $2,164 of electricity to get the true cost. We may earn a commission if you buy through these links; as an Amazon Associate we earn from qualifying purchases.
- Price. Check what it costs at the store.
- Plus running cost. Add $2,164 of electricity over 13 years. That is the part the price tag hides.
- Compare. Pick your state below, then check the cheaper-to-run models of the same size.
About the Rheem PRO H50 T2 RH310BM
The Rheem PRO H50 T2 RH310BM is a 45 gal 240-volt integrated heat pump water heater certified by ENERGY STAR. Its official test figure is 915 kWh of electricity a year, which at the U.S. average price of 18.19¢ per kWh comes to $166 a year, or $2,164 over a typical 13-year life.
For the same hot water, a standard electric tank water heater would use about 3,481 kWh a year, so this model uses 74% less electricity and saves about $467 a year.
Among 371 240-volt integrated models it ranks #154 for running cost. The cheapest model of this type would save $643 in electricity over 13 years, though it may differ in size and features.
If you want the same type and a similar size for less to run, the GE Profile PH40S10BPY01 uses 773 kWh a year and would save about $336 over 13 years.
Cost to run where you live
915 kWh a year (ENERGY STAR test figure) × 18.19¢ per kWh, the average residential price in the U.S. for Jan–Aug 2026 (EIA). Your bill depends on your utility and how you use it.
Cheaper to run, same type and size
Or see every under 50 gallons model ranked.
| GE Profile PH40S10BPY01 | 40 gal | $141/yr | saves $336 |
| A. O. Smith HPS10-50H45DV 2 series | 46 gal | $151/yr | saves $199 |
| A. O. Smith HPSN10-50H45DV 2 series | 46 gal | $151/yr | saves $199 |
| A. O. Smith HPTS-50 2 series | 46 gal | $151/yr | saves $199 |
Specs
| Brand | Rheem |
| Models | PRO H50 T2 RH310BM, PRO H50 T2 RH310UM |
| Type | 240-volt integrated |
| Energy use | 915 kWh / year |
| Federal maximum for this type | 3481 kWh / year |
| Size | 45 gal |
| Width | 22.3 in |
| Tank size | 45 gal |
| First-hour rating | 67 gal |
| Efficiency (UEF) | 3.50 |
| Usage pattern | Medium-Usage |
| Voltage | 240 |
| Tank height | 61.8 in |
| Tank diameter | 22.3 in |
Specs and energy use from the ENERGY STAR certified products list (U.S. EPA). An asterisk in a model number stands for colour or finish codes. HouseholdLeak is not affiliated with ENERGY STAR or the EPA.
Questions people ask
How much does the Rheem PRO H50 T2 RH310BM cost to run?
About $166 a year at the U.S. average electricity price (18.19¢/kWh), based on its ENERGY STAR rating of 915 kWh a year. In a state with expensive power it can be much more; pick your state on this page to see your number.
How much will the Rheem PRO H50 T2 RH310BM cost in electricity over its life?
About $2,164 over 13 years, a typical life for a heat pump water heater. Add that to the price you pay to get the true cost to own.
Is the Rheem PRO H50 T2 RH310BM energy efficient?
Yes. It is ENERGY STAR certified and uses 74% less electricity than a standard electric tank water heater.
Is there a cheaper water heater to run of the same type and size?
Yes. The GE Profile PH40S10BPY01 uses 773 kWh a year, about $336 less in electricity over 13 years.
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