MRCOOL MEWH30S82S1
MRCOOL MEWH30S82S1 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 Midea D30-45FH.
Certified figures
- Storage volume
- 28gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 47gallonsHot water in the first hour
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| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| MTWH04530E | 28 | 0.92 | 47 | 98% | Low |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 28 gallons in the test, 2 gallons less than its 30-gallon sold size. Starting full, it gives 47 gallons of hot water in its first hour of use. That is 19 gallons more than its tank holds, since it reheats during the hour. Of 477 electric storage models, 350 give more hot water in the first hour. The median electric storage model gives 55 gallons in the first hour of the test.
In the test, 8% of its energy does not reach the hot water (UEF 0.92). The daily hot water use in the test, called its draw pattern, was low. Of 157 electric storage models with the same draw pattern, 12 have a higher UEF and 76 a lower one. On its draw pattern, its UEF is also the median electric storage UEF. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).
There are 6 more basic models with the same test figures. Of those, one or more are under the Midea and Stream 33 brands. For the full group, see the Midea D30-45FH page.
Also listed as
They carry every figure in the table above.
- Every MRCOOL basic model
- Every 30-gallon electric storage water heater
- Every electric storage water heater
Not covered
- Advertised figures. We have none on file for this model.