Westinghouse ET003
Westinghouse ET003 is in the DOE listing as of Oct 19, 2026.
- Electric tankless water heater
- 2 listed models
ENERGY STAR certification does not cover this type of water heater.
Its figures are also listed under EEMAX AM004120T.
Certified figures
- Flow at a 67°F rise
- 0.3gallons per minute
- UEF
- 0.93Uniform 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 0.3 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 |
|---|---|---|---|---|
| ET003A5BG | 0.93 | 0.3 | 93% | Very small |
| ET003A5DB | 0.93 | 0.3 | 93% | Very small |
UEF is the uniform energy factor. A dash means the model has no such figure.
It warms 0.3 gallons per minute of water from 58°F to 125°F in the test. The electric tankless type has a median flow of 0.7 gallons per minute. Of 337 electric tankless models, 271 have a higher flow than this one.
In tests, 93% of the energy went to hot water, so its UEF is 0.93. Its test ran at the very small level of daily hot water use. Of 272 electric tankless models with the same draw pattern, 217 have a higher UEF. For its type and draw pattern, the median UEF is 0.96. While it heats water, 93% of the energy used goes into the water (its recovery efficiency).
It is sold as ET003A5BG and ET003A5DB. There are 3 more basic models with the same test figures. Of those, one or more are under the EEMAX, Fogatti, and Mizudo brands. For the full group, see the EEMAX AM004120T.
Also listed as
They carry every figure in the table above.
- Every Westinghouse basic model
- Every electric tankless water heater certified below 1.0 gallon per minute
- Every electric tankless water heater
Not covered
- Advertised figures. We have none on file for this model.