A. O. Smith ENL-36 2**
A. O. Smith ENL-36 2** is in the DOE listing as of Oct 26, 2026.
It has a labeled size of 36 gallons, a certified storage volume of 33 gallons, a certified UEF of 0.92, and a certified first-hour rating of 51 gallons of hot water.
Its advertised UEF of 0.92 from A. O. Smith matches the certified 0.92 (Read Oct 4, 2026).
- Electric storage water heater
- 4 listed models
ENERGY STAR certification does not cover this type of water heater.
Certified figures
- Storage volume
- 33gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 51gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 36 gal, nominal size | 33 gal storage volume | A. O. Smith | Read Oct 4, 2026 |
| Size | 33 gal | 33 gal storage volume | A. O. Smith | Read Oct 4, 2026 |
| UEF | 0.92 | 0.92 | A. O. Smith | Read Oct 4, 2026 |
| First-hour rating | 51 gal | 51 gal | A. O. Smith | Read Oct 4, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| DEL-30 2** | 33 | 0.92 | 51 | 98% | Medium |
| E6-36L45DV 2** | 33 | 0.92 | 51 | 98% | Medium |
| ENL-36 2** | 33 | 0.92 | 51 | 98% | Medium |
| PNL-36 2** | 33 | 0.92 | 51 | 98% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 33 gallons in the test, 3 gallons less than its 36-gallon sold size. It delivers 51 gallons of hot water in the test's first hour. That is 18 gallons more than its tank holds, since it reheats during the hour. Among 477 electric storage models, 286 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). The daily hot water use in the test, called its draw pattern, was medium. Among 297 electric storage models on its draw pattern, 81 have a higher UEF. Its UEF is the median for its type and draw pattern. The water took in 98% of the energy used to reheat it (its recovery efficiency).
A tag or quote may show any of its 4 model numbers. Its test figures match those of 8 other basic models. They are listed under 8 other brands, one each.
Also listed as
They carry every figure in the table above.
- Every A. O. Smith basic model
- Every 40-gallon electric storage water heater
- Every electric storage water heater
Not covered
- Changes to an advertised figure after the date beside it.