Stiebel Eltron Mini 3-1
Stiebel Eltron Mini 3-1 is in the DOE listing as of Oct 19, 2026.
- Electric tankless water heater
- 1 listed model
ENERGY STAR certification does not cover this type of water heater.
Its figures are also listed under A. O. Smith UPVA-30K 1**.
Certified figures
- Flow at a 67°F rise
- 0.3gallons per minute
- UEF
- 0.93Uniform energy factor
Your fixtures at once
Change your hour and flowFlow where you live
Colder incoming water needs a bigger rise, so the heater gives less flow.
- Cold water
- Cold water must be at least 10°F colder than the hot water setting.
- Flow estimate
- The estimate uses the lowest certified flow among the listed models. It is about 0.3 gal/min at a 70°F rise.
Flow limits
- The estimate excludes the flow needed to turn the heater on, heat lost in pipes, and installation.
- Cold water from a well or long pipe run can differ from the temperature you enter.
- Without a stated flow limit, estimates for warmer water may exceed the heater’s actual flow.
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| Mini 3-1 | 0.93 | 0.3 | 98% | Very small |
UEF is the uniform energy factor. A dash means the model has no such figure.
At a 67°F rise, its flow in the test is 0.3 gallons per minute. The median electric tankless model heats 0.7 gallons per minute by 67°F. Of 337 electric tankless models, 271 have a higher flow than this one.
In tests, 93% of the energy went to hot water, so its UEF is 0.93. Its test ran at the very small level of daily hot water use. Of 272 electric tankless models with the same draw pattern, 217 have a higher UEF. On its draw pattern, the median electric tankless UEF is 0.96. While it heats water, 98% of the energy used goes into the water (its recovery efficiency).
There are 6 more basic models with the same test figures. In all, 4 other brands list one or more of them. For the full group, see the A. O. Smith UPVA-30K 1**.
Also listed as
They carry every figure in the table above.
- Every Stiebel Eltron basic model
- Every electric tankless water heater certified below 1.0 gallon per minute
- Every electric tankless water heater
Not covered
- Advertised figures. We have none on file for this model.