Hubbell MP55F
Hubbell MP55F is in the DOE listing as of Oct 26, 2026.
It has a labeled size of 55 gallons, a certified storage volume of 54 gallons, a certified UEF of 0.92, and a certified first-hour rating of 58 gallons of hot water.
- Electric storage water heater
- 1 listed model
ENERGY STAR certification does not cover this type of water heater.
Certified figures
- Storage volume
- 54gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 58gallonsHot water in the first hour
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| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| MP55F | 54 | 0.92 | 58 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 54 gallons in the test, 1 gallon less than its 55-gallon sold size. Over one hour from a full tank, it gave 58 gallons in the test (its first-hour rating). That is 4 gallons more than its tank holds, since it reheats during the hour. In the first hour, 168 of the 477 electric storage models give more hot water. The median electric storage model gives 55 gallons in the first hour of the test.
In tests, 92% of the energy went to hot water, so its UEF is 0.92. The daily hot water use in the test, called its draw pattern, was medium. Of 297 electric storage models with the same draw pattern, 81 have a higher UEF. On its draw pattern, its UEF is also the median electric storage UEF. The water took in 98% of the energy used to reheat it (its recovery efficiency).
Its test figures match those of 2 other basic models. Of those, one or more are under the VAUGHN and VAUGHN THERMAL brands.
Also listed as
They carry every figure in the table above.
- Every Hubbell 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.