Ariston ENS50H-DR***
Ariston ENS50H-DR*** 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 A. O. Smith HESF-50 1**.
Certified figures
- Storage volume
- 46gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 67gallonsHot water in the first hour
Your busiest hour
Change your hourCertified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| ESDR50T-* | 46 | 0.92 | 67 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 46 gallons in the test, 4 gallons less than its 50-gallon sold size. It delivers 67 gallons of hot water in the test's first hour. That is 21 gallons more than its tank holds, since it reheats during the hour. Among 477 electric storage models, 51 have a higher first-hour rating. The median electric storage model gives 55 gallons in the first hour of the test.
In tests, 92% of the energy it uses ends up as hot water (UEF 0.92). Its test ran at the medium level of daily hot water use. Its UEF is lower than that of 81 of the 297 electric storage models with its draw pattern. Its UEF is the median for its type and draw pattern. When it reheats water in the test, 98% of the energy it uses ends up in the water.
There are 7 more basic models with the same test figures. They are listed under 7 other brands, one each. For the full group, see the A. O. Smith HESF-50 1** page.
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.