A. O. Smith HETF-50 1**
A. O. Smith HETF-50 1** is in the DOE listing as of Oct 26, 2026.
It has a labeled size of 50 gallons, a certified storage volume of 45 gallons, a certified UEF of 0.92, and a certified first-hour rating of 74 gallons of hot water.
Its advertised UEF of 0.92 from A. O. Smith matches the certified 0.92 (Read Oct 5, 2026).
- Electric storage water heater
- 7 listed models
ENERGY STAR certification does not cover this type of water heater.
Certified figures
- Storage volume
- 45gallons
- UEF
- 0.92Uniform energy factor
- First-hour rating
- 74gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 50 gal, nominal size | 45 gal storage volume | A. O. Smith | Read Oct 5, 2026 |
| Size | 45 gal | 45 gal storage volume | A. O. Smith | Read Oct 5, 2026 |
| UEF | 0.92 | 0.92 | A. O. Smith | Read Oct 5, 2026 |
| First-hour rating | 62 gal | 74 gal | A. O. Smith | Read Oct 5, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| EEA12-50H55DVF 1** | 45 | 0.92 | 74 | 98% | Medium |
| EEA9-50H55DV 1** | 45 | 0.92 | 74 | 98% | Medium |
| EETU-50 1** | 45 | 0.92 | 74 | 98% | Medium |
| EEU6-50H45DV 1** | 45 | 0.92 | 74 | 98% | Medium |
| HETF-50 1** | 45 | 0.92 | 74 | 98% | Medium |
| HETFA-50 1** | 45 | 0.92 | 74 | 98% | Medium |
| PETU-50 1** | 45 | 0.92 | 74 | 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 74 gallons in the test (its first-hour rating). Its tank holds 45 gallons, so reheating adds 29 gallons during the first hour. Of 477 electric storage models, 23 give more hot water in the first hour. Among electric storage models, the median first-hour rating is 55 gallons.
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 and 2 a lower one. For its type and draw pattern, its UEF sits at the median. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).
It is sold under 7 model numbers in all. All of its test figures are shared by 4 other basic models. Each of them is listed under a different brand.
Also listed as
They carry every figure in the table above.
- Every A. O. Smith basic model
- Every 50-gallon electric storage water heater
- Every electric storage water heater
Not covered
- Changes to an advertised figure after the date beside it.