EEMAX SPEX48T
EEMAX SPEX48T 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 SPEX48T.
Certified and advertised figures
- Flow at a 67°F rise
- 0.4gallons per minuteCertified
- Advertised flow
- 2.0gallons per minuteSupplyHouse, no rise stated
- 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 0.4 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.
Advertised and certified figures
| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| Flow | 2.0 gal/min, no rise stated | 0.4 gal/min at a 67°F rise | SupplyHouse | Archived copy, Feb 25, 2024 |
| Flow | 0.7 gal/min at a 50°F rise | 0.4 gal/min at a 67°F rise | SupplyHouse | Archived copy, Feb 25, 2024 |
| Flow | 0.5 gal/min at a 40°F rise | 0.4 gal/min at a 67°F rise | SupplyHouse | Archived copy, Feb 25, 2024 |
| Flow | 0.5 gal/min at a 60°F rise | 0.4 gal/min at a 67°F rise | SupplyHouse | Archived copy, Feb 25, 2024 |
| Flow | 0.5 gal/min at a 70°F rise | 0.4 gal/min at a 67°F rise | SupplyHouse | Archived copy, Feb 25, 2024 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| SPEX48T | 0.97 | 0.4 | 94% | 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 flow among electric tankless models is 0.7 gallons per minute. Its flow at a 67°F rise trails 233 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. For its type and draw pattern, the median UEF is 0.96. While it heats water, 94% of the energy used goes into the water (its recovery efficiency).
There is one more basic model with the same test figures. That one carries the Rheem brand name. You can find the whole group on the page for the Rheem SPEX48T.
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
- Changes to an advertised figure after the date beside it.