ECOSMART ECO 11
ECOSMART ECO 11 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 ECO 11.
Certified and advertised figures
- Flow at a 67°F rise
- 1.2gallons per minuteCertified
- Advertised flow
- 3.1gallons per minuteThe Home Depot, no rise stated
- UEF
- 0.92Uniform 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 1.1 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 | 0.98 | 0.92 | The Home Depot | Archived copy, Nov 9, 2025 |
| Flow | 3.1 gal/min, no rise stated | 1.2 gal/min at a 67°F rise | The Home Depot | Archived copy, Nov 9, 2025 |
| Flow | 2.54 gal/min at a 35°F rise | 1.2 gal/min at a 67°F rise | The Home Depot | Archived copy, Nov 9, 2025 |
| Flow | 1.97 gal/min at a 45°F rise | 1.2 gal/min at a 67°F rise | The Home Depot | Archived copy, Nov 9, 2025 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| ECO 11 | 0.92 | 1.2 | 92% | Very small |
UEF is the uniform energy factor. A dash means the model has no such figure.
It heats 1.2 gallons per minute of water by 67°F in the test. The electric tankless type has a median flow of 0.7 gallons per minute. Among 337 electric tankless models, 64 give more flow at a 67°F rise.
In tests, 92% of the energy went to hot water, so its UEF is 0.92. Its test ran at the very small level of daily hot water use. Among 272 electric tankless models on its draw pattern, 249 have a higher UEF. For its type and draw pattern, the median UEF is 0.96. When it runs, 92% of the energy it uses reaches the water (its recovery efficiency).
Its test figures match those of 2 other basic models. Those basic models are sold with EEMAX and Rheem as their brand names. For the full group, see the Rheem ECO 11 page.
Also listed as
They carry every figure in the table above.
- Every ECOSMART basic model
- Every electric tankless water heater certified at 1.0 to 1.9 gallons per minute
- Every electric tankless water heater
Not covered
- Changes to an advertised figure after the date beside it.