Lochinvar GPDX-75L 3**
- Gas storage water heater
- 2 listed models
This model is not in the current certification listing as of Oct 26, 2026. It was last listed on Oct 2, 2026.
Its figures are also listed under A. O. Smith GPDX-75L 3**.
Certified figures
- Storage volume
- 72gallons
- UEF
- 0.68Uniform energy factor
- First-hour rating
- 129gallonsHot water in the first hour
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Change your hourProduct history
Lochinvar GPDX-75L 3** left the DOE listing between Oct 2, 2026 and Oct 17, 2026.
Lochinvar GPDX-75L 3** was in the DOE listing by Oct 2, 2026.
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| PRL07575ESST 3*1 | 72 | 0.68 | 129 | 72% | — |
| PRN07575ESST 3** | 72 | 0.68 | 129 | 72% | — |
UEF is the uniform energy factor. A dash means the model has no such figure.
It holds 72 gallons in the test, 3 gallons less than its 75-gallon sold size. It delivers 129 gallons of hot water in the test's first hour. That is 57 gallons more than its tank holds, since it reheats during the hour.
In tests, 68% of the energy it uses ends up as hot water (UEF 0.68). Of the energy spent to reheat water, 72% goes into it (its recovery efficiency).
It is the basic model for PRL07575ESST 3*1 and PRN07575ESST 3**. For the full group, see the A. O. Smith GPDX-75L 3**.
Not covered
- Advertised figures. We have none on file for this model.