Ariston ENS50H*
Ariston ENS50H* 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 AMERICAN STANDARD WATER HEATERS ENS50H*.
Certified figures
- Storage volume
- 45gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 65gallonsHot water in the first hour
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| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| ES50T* | 45 | 0.92 | 65 | 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 65 gallons in the test (its first-hour rating). That is 20 gallons more than its tank holds, since it reheats during the hour. In the first hour, 66 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 it uses ends up as hot water (UEF 0.92). In the test, daily hot water use was set to medium (its draw pattern). Among 297 electric storage models on its draw pattern, 81 have a higher UEF. 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).
Its test figures match those of 2 other basic models. The AMERICAN STANDARD WATER HEATERS and Lennox brands list one or more of them. You can find the whole group on the page for the AMERICAN STANDARD WATER HEATERS ENS50H*.
Also listed as
They carry every figure in the table above.
- Every Ariston 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.