EEMAX SPEX100
EEMAX SPEX100 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 SPEX100.
Certified figures
- Flow at a 67°F rise
- 1.0gallons 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 1.0 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 |
|---|---|---|---|---|
| SPEX100 | 0.96 | 1.0 | 94% | 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 1.0 gallons per minute. The median electric tankless model heats 0.7 gallons per minute by 67°F. Among 337 electric tankless models, 91 give more flow at a 67°F rise.
In the test, 4% of its energy does not reach the hot water (UEF 0.96). In the test, daily hot water use was set to very small (its draw pattern). Of 272 electric tankless models with the same draw pattern, 77 have a higher UEF. On its draw pattern, its UEF is also the median electric tankless UEF. Of the energy it spends heating water, 94% ends up in it (its recovery efficiency).
All of its test figures are shared by 2 other basic models. The KWICKSHOT and Rheem brands list one or more of them. For the full group, see the Rheem SPEX100.
Also listed as
They carry every figure in the table above.
- Every EEMAX basic model
- Every electric tankless water heater certified at 1.0 to 1.9 gallons per minute
- Every electric tankless water heater
Not covered
- Advertised figures. We have none on file for this model.