MRCOOL MEWH50T82S1
MRCOOL MEWH50T82S1 is in the DOE listing as of Oct 19, 2026.
- Electric storage water heater
- 1 listed model
ENERGY STAR certification does not cover this type of water heater.
Its figures are also listed under Rheem XE50M12CS55U1.
Certified figures
- Storage volume
- 45gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 63gallonsHot water in the first hour
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| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| MTWH04550ET | 45 | 0.92 | 63 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 45 gallons in the test, 5 gallons less than its 50-gallon sold size. Over one hour from a full tank, it gave 63 gallons in the test (its first-hour rating). Reheating lets it give 18 gallons beyond the 45 gallons in its tank. In the first hour, 99 of the 477 electric storage models give more hot water. The median electric storage model gives 55 gallons in its first hour.
In tests, 92% of the energy went to hot water, so its UEF is 0.92. Its test simulated a day of medium hot water use (its draw pattern). Of 297 electric storage models with the same draw pattern, 81 have a higher UEF and 2 a lower one. On its draw pattern, its UEF is also the median electric storage UEF. When it reheats water in the test, 98% of the energy it uses ends up in the water.
Its test figures match those of 12 other basic models. Besides this brand, 6 brands list one or more of them. For the full group, see the Rheem XE50M12CS55U1.
Also listed as
They carry every figure in the table above.
- Every MRCOOL basic model
- Every 50-gallon electric storage water heater
- Every electric storage water heater
Not covered
- Advertised figures. We have none on file for this model.