Stiebel Eltron Mini-E 2-1
Stiebel Eltron Mini-E 2-1 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 2-1 | 0.97 | 0.3 | 98% | Very small |
UEF is the uniform energy factor. A dash means the model has no such figure.
It heats 0.3 gallons per minute of water by 67°F in the test. The median electric tankless model heats 0.7 gallons per minute by 67°F. Its flow at a 67°F rise trails 271 of the 337 electric tankless models.
In tests, 97% of the energy it uses ends up as hot water (UEF 0.97). Its test simulated a day of very small hot water use (its draw pattern). Of 272 electric tankless models with the same draw pattern, 37 have a higher UEF and 195 a lower one. For its type and draw pattern, the median UEF is 0.96. While it heats water, 98% of the energy used goes into the water (its recovery efficiency).
All of its test figures are shared by 11 other basic models. Of those, one or more are under the Aquapower, EEMAX, and Rheem brands. For the full group, see 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.