Electrolex EHW199
Electrolex EHW199 is in the DOE listing as of Oct 26, 2026.
It has a certified UEF of 0.81 and a certified flow of 5.0 gal/min at a 67°F rise.
- Gas tankless water heater
- 2 listed models
Not listed as ENERGY STAR certified on Oct 26, 2026.
Certified figures
- Flow at a 67°F rise
- 5.0gallons per minute
- UEF
- 0.81Uniform 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 4.8 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 |
|---|---|---|---|---|
| EHW199A0W-LP | 0.81 | 5.0 | 81% | High |
| EHW199A0W-NG | 0.81 | 5.0 | 81% | High |
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 5.0 gallons per minute. The gas tankless type has a median flow of 4.8 gallons per minute. Its flow at a 67°F rise trails 176 of the 487 gas tankless models.
It was not listed as ENERGY STAR certified on Oct 26, 2026. In the test, 19% of its energy does not reach the hot water (UEF 0.81). Its test ran at the high level of daily hot water use. Among 399 gas tankless models on its draw pattern, 327 have a higher UEF. On its draw pattern, the median gas tankless UEF is 0.93. While it heats water, 81% of the energy used goes into the water (its recovery efficiency).
Its 2 model numbers are EHW199A0W-LP and EHW199A0W-NG. All of its test figures are shared by 2 other basic models. The Mizudo and Westinghouse brands list one or more of them.
Also listed as
They carry every figure in the table above.
- Every Electrolex basic model
- Every gas tankless water heater certified at 5.0 to 5.9 gallons per minute
- Every gas tankless water heater
- The most-searched gas tankless models side by side
Not covered
- Advertised figures. We have none on file for this model.