Aquapower Mini-E 3.5-1
Aquapower Mini-E 3.5-1 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 Stiebel Eltron Mini-E 3.5-1.
Certified figures
- Flow at a 67°F rise
- 0.4gallons per minute
- UEF
- 0.96Uniform 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 0.4 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 |
|---|---|---|---|---|
| AQM-E 3.5-1 | 0.96 | 0.4 | 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 0.4 gallons per minute. The median flow among electric tankless models is 0.7 gallons per minute. Of 337 electric tankless models, 233 have a higher flow than this one.
In tests, 96% of the energy it uses ends up as hot water (UEF 0.96). The daily hot water use in the test, called its draw pattern, was very small. Of 272 electric tankless models with the same draw pattern, 77 have a higher UEF. For its type and draw pattern, its UEF sits at the median. When it runs, 98% of the energy it uses reaches the water (its recovery efficiency).
There is one more basic model with the same test figures. The brand name on that one is Stiebel Eltron. You can find the whole group on the page for the Stiebel Eltron Mini-E 3.5-1.
Also listed as
They carry every figure in the table above.
- Every Aquapower 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.