Rheem SPEX2412
Rheem SPEX2412 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 SPEX1812.
Certified and advertised figures
- Flow at a 67°F rise
- 0.2gallons per minuteCertified
- Advertised flow
- 1.5gallons per minuteRheem, no rise stated
- UEF
- 0.95Uniform 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 0.2 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 |
|---|---|---|---|---|
| UEF | 1.00 | 0.95 | The Home Depot | Archived copy, Aug 24, 2025 |
| Flow | 1.5 gal/min, no rise stated | 0.2 gal/min at a 67°F rise | Rheem | Read Oct 5, 2026 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| RTEH2412 | 0.95 | 0.2 | 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 0.2 gallons per minute. The median electric tankless model heats 0.7 gallons per minute by 67°F. Its flow at a 67°F rise trails 320 of the 337 electric tankless models.
In tests, 95% of the energy it uses ends up as hot water (UEF 0.95). Its test simulated a day of very small hot water use (its draw pattern). Of 272 electric tankless models with the same draw pattern, 151 have a higher UEF and 85 a lower one. On its draw pattern, the median electric tankless UEF is 0.96. While it heats water, 94% of the energy used goes into the water (its recovery efficiency).
Its test figures match those of 4 other basic models. Those basic models are sold with EEMAX and KWICKSHOT as their brand names. You can find the whole group on the page for the Rheem SPEX1812.
Also listed as
They carry every figure in the table above.
- Every Rheem 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.