Stiebel Eltron PSH 20
Stiebel Eltron PSH 20 is in the DOE listing as of Oct 26, 2026.
It has a labeled size of 21 gallons, a certified storage volume of 21 gallons, a certified UEF of 0.93, and a certified first-hour rating of 30 gallons of hot water.
Its advertised UEF of 0.93 from The Home Depot matches the certified 0.93 (Archived copy, Aug 13, 2025).
- Electric storage water heater
- 1 listed model
ENERGY STAR certification does not cover this type of water heater.
Certified figures
- Storage volume
- 21gallons
- UEF
- 0.93Uniform energy factor
- First-hour rating
- 30gallonsHot water in the first hour
Your busiest hour
Change your hourAdvertised and certified figures
| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Size | 21 gal, nominal size | 21 gal storage volume | The Home Depot | Archived copy, Aug 13, 2025 |
| UEF | 0.93 | 0.93 | The Home Depot | Archived copy, Aug 13, 2025 |
| First-hour rating | 30 gal | 30 gal | The Home Depot | Archived copy, Aug 13, 2025 |
Certified figures by listed model
| Model number | Storage volume (gal) | UEF | First-hour rating (gal) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|---|
| PSH 20 | 21 | 0.93 | 30 | 98% | Low |
UEF is the uniform energy factor. A dash means the model has no such figure.
Sold as 21 gallons, it holds 21 gallons in the test. It delivers 30 gallons of hot water in the test's first hour. That is 9 gallons more than its tank holds, since it reheats during the hour. Of 477 electric storage models, 475 give more hot water in the first hour. Among electric storage models, the median first-hour rating is 55 gallons.
In tests, 93% of the energy it uses ends up as hot water (UEF 0.93). In the test, daily hot water use was set to low (its draw pattern). Of 157 electric storage models with the same draw pattern, 2 have a higher UEF and 145 a lower one. On its draw pattern, the median electric storage UEF is 0.92. The water took in 98% of the energy used to reheat it (its recovery efficiency).
Not covered
- Changes to an advertised figure after the date beside it.