Stiebel Eltron Mini -E 3-1
Stiebel Eltron Mini -E 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 Rheem SPEX3208T.
Certified figures
- Flow at a 67°F rise
- 0.3gallons per minute
- UEF
- 0.97Uniform energy factor
Your fixtures at once
Change your hour and flowFlow where you live
The heater gives less flow when colder incoming water needs a bigger rise.
- 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 -E 3-1 | 0.97 | 0.3 | 98% | Very small |
UEF is the uniform energy factor. A dash means the model has no such figure.
It warms 0.3 gallons per minute of water from 58°F to 125°F in the test. The median flow among electric tankless models is 0.7 gallons per minute. Among 337 electric tankless models, 271 give more flow at a 67°F rise.
In the test, 3% of its energy does not reach the hot water (UEF 0.97). In the test, daily hot water use was set to very small (its draw pattern). Among 272 electric tankless models on its draw pattern, 37 have a higher UEF. For its type and draw pattern, the median UEF is 0.96. Of the energy it spends heating water, 98% ends up in it (its recovery efficiency).
There are 11 more basic models with the same test figures. The Aquapower, EEMAX, and Rheem brands list one or more of them. You can find the whole group on the page for the Rheem SPEX3208T.
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.