Rheem RHE40SP
Rheem RHE40SP is in the DOE listing as of Oct 26, 2026.
It has a labeled size of 40 gallons, a certified storage volume of 37 gallons, a certified UEF of 0.75, and a certified first-hour rating of 68 gallons of hot water.
- Gas storage water heater
- 2 listed models
Not listed as ENERGY STAR certified on Oct 26, 2026.
Certified figures
- Storage volume
- 37gallons
- UEF
- 0.75Uniform energy factor
- First-hour rating
- 68gallonsHot water in the first hour
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| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| CNRHE40SP | 37 | 0.75 | 68 | 87% | Medium |
| RHE40SP | 37 | 0.75 | 68 | 87% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 37 gallons in the test, 3 gallons less than its 40-gallon sold size. It delivers 68 gallons of hot water in the test's first hour. That is 31 gallons more than its tank holds, since it reheats during the hour. Among 763 gas storage models, 529 have a higher first-hour rating. The median gas storage model gives 78 gallons in the first hour of the test.
It was not listed as ENERGY STAR certified on Oct 26, 2026. In tests, 75% of the energy went to hot water, so its UEF is 0.75. Its test ran at the medium level of daily hot water use. No other gas storage model among the 288 on its draw pattern has a higher UEF. For its type and draw pattern, the UEF runs from 0.57 to 0.75. The water took in 87% of the energy used to reheat it (its recovery efficiency).
It is sold as CNRHE40SP and RHE40SP. All of its test figures are shared by 3 other basic models. The ECOSENSE, Richmond, and Ruud brands list one or more of them.
It may qualify for 2 rebate programs in 2 states.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program page |
|---|---|---|---|
| Xcel Energy MINNESOTA RESIDENTIAL ENERGY EFFICIENCY PROGRAMS (gas storage, gas tankless) | MN | May qualify | Its own page |
| Avista Home and small commercial: HVAC and water heating incentives (gas storage) | WA | May qualify | Its own page |
Programs change their terms. Check the program's own page before you buy.
- Every Rheem basic model
- Every 40-gallon gas storage water heater
- Every gas storage water heater
- The most-searched gas storage models side by side
Not covered
- Advertised figures. We have none on file for this model.