AMERICAN STANDARD WATER HEATERS ENS30LUB*
AMERICAN STANDARD WATER HEATERS ENS30LUB* is in the DOE listing as of Oct 26, 2026.
It has a labeled size of 30 gallons, a certified storage volume of 28 gallons, a certified UEF of 0.92, and a certified first-hour rating of 40 gallons of hot water.
Its advertised UEF of 0.92 from AMERICAN STANDARD WATER HEATERS matches the certified 0.92 (Read Oct 5, 2026).
- Electric storage water heater
- 1 listed model
ENERGY STAR certification does not cover this type of water heater.
Certified figures
- Storage volume
- 28gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 40gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 30 gal, nominal size | 28 gal storage volume | AMERICAN STANDARD WATER HEATERS | Read Oct 5, 2026 |
| Size | 28 gal | 28 gal storage volume | AMERICAN STANDARD WATER HEATERS | Read Oct 5, 2026 |
| UEF | 0.92 | 0.92 | AMERICAN STANDARD WATER HEATERS | Read Oct 5, 2026 |
| First-hour rating | 40 gal | 40 gal | AMERICAN STANDARD WATER HEATERS | Read Oct 5, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| ENS30LUB* | 28 | 0.92 | 40 | 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 40 gallons of hot water in its first hour of use. Reheating lets it give 12 gallons beyond the 28 gallons in its tank. Among 477 electric storage models, 444 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 ran at the low level of daily hot water use. Among 157 electric storage models on its draw pattern, 12 have a higher UEF. Its UEF is the median for its type and draw pattern. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).
There are 2 more basic models with the same test figures. Those basic models are sold with Ariston and Lennox as their brand names.
Also listed as
They carry every figure in the table above.
- Every AMERICAN STANDARD WATER HEATERS basic model
- Every 30-gallon electric storage water heater
- Every electric storage water heater
Not covered
- Changes to an advertised figure after the date beside it.