State HETF-55 1**
State HETF-55 1** is in the DOE listing as of Oct 19, 2026.
- Electric storage water heater
- 3 listed models
ENERGY STAR certification does not cover this type of water heater.
Its figures are also listed under A. O. Smith HETF-55 1**.
Certified figures
- Storage volume
- 55gallons
- UEF
- 0.94Uniform energy factor
- First-hour rating
- 75gallonsHot water in the first hour
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| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 55 gal, nominal size | 55 gal storage volume | State | Read Oct 5, 2026 |
| Size | 55 gal | 55 gal storage volume | State | Read Oct 5, 2026 |
| UEF | 0.94 | 0.94 | State | Read Oct 5, 2026 |
| First-hour rating | 75 gal | 75 gal | State | Read Oct 5, 2026 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| EE6-55-DURT 1** | 55 | 0.94 | 75 | 98% | High |
| EEA8-55-DFRT 1** | 55 | 0.94 | 75 | 98% | High |
| EEX-55-DURT 1** | 55 | 0.94 | 75 | 98% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
Sold as 55 gallons, it holds 55 gallons in the test. Starting full, it gives 75 gallons of hot water in its first hour of use. That is 20 gallons more than its tank holds, since it reheats during the hour. Of 477 electric storage models, 14 give more hot water in the first hour. Among electric storage models, the median first-hour rating is 55 gallons.
In tests, 94% of the energy went to hot water, so its UEF is 0.94. Its test simulated a day of high hot water use (its draw pattern). Among 23 electric storage models with its draw pattern, none reaches a higher UEF than this one. On its draw pattern, its UEF is also the median electric storage UEF. When it reheats water in the test, 98% of the energy it uses ends up in the water.
It is the basic model for EE6-55-DURT 1**, EEA8-55-DFRT 1**, and EEX-55-DURT 1**. All of its test figures are shared by 4 other basic models. They are listed under 4 other brands, one each. You can find the whole group on the page for the A. O. Smith HETF-55 1**.
Also listed as
They carry every figure in the table above.
- Every State 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.