EEMAX SPEX4277
EEMAX SPEX4277 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 SPEX4277.
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
A bigger rise from colder incoming water leaves the heater with 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 |
|---|---|---|---|---|
| SPEX4277 | 0.96 | 0.4 | 96% | Very small |
UEF is the uniform energy factor. A dash means the model has no such figure.
It warms 0.4 gallons per minute of water from 58°F to 125°F in the test. The median electric tankless model heats 0.7 gallons per minute by 67°F. Of 337 electric tankless models, 233 have a higher flow than this one.
In the test, 4% of its energy does not reach the hot water (UEF 0.96). The daily hot water use in the test, called its draw pattern, was very small. Among 272 electric tankless models on its draw pattern, 77 have a higher UEF. Its UEF is the median for its type and draw pattern. While it heats water, 96% of the energy used goes into the water (its recovery efficiency).
Its test figures match those of 2 other basic models. Of those, one or more are under the KWICKSHOT and Rheem brands. You can find the whole group on the page for the Rheem SPEX4277.
Also listed as
They carry every figure in the table above.
- Every EEMAX 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.