MRCOOL MTWH04550E
MRCOOL MTWH04550E 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 D50-45FH.
Certified figures
- Storage volume
- 47gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 64gallonsHot water in the first hour
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| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| MTWH04550E | 47 | 0.92 | 64 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It delivers 64 gallons of hot water in the test's first hour. Reheating lets it give 17 gallons beyond the 47 gallons in its tank. Among 477 electric storage models, 74 have a higher first-hour rating. The median electric storage model gives 55 gallons in its first hour.
In tests, 92% of the energy it uses ends up as hot water (UEF 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.
All of its test figures are shared by 4 other basic models. Of those, one or more are under the Midea and Stream 33 brands. For the full group, see the Midea D50-45FH page.
Also listed as
They carry every figure in the table above.
Not covered
- Advertised figures. We have none on file for this model.