RELIANCE WATER HEATERS R2VR-180E 1**
RELIANCE WATER HEATERS R2VR-180E 1** 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 A. O. Smith R2VR-180E 1**.
Certified and advertised figures
- Flow at a 67°F rise
- 1.6gallons per minuteCertified
- Advertised flow
- 1.6gallons per minuteRELIANCE WATER HEATERS, at a 67°F rise
- UEF
- 0.84Uniform 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 1.5 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 | 0.84 | 0.84 | RELIANCE WATER HEATERS | Read Oct 4, 2026 |
| Flow | 1.6 gal/min at a 67°F rise | 1.6 gal/min at a 67°F rise | RELIANCE WATER HEATERS | Read Oct 4, 2026 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| R2VX-180E 1** | 0.84 | 1.6 | 98% | — |
UEF is the uniform energy factor. A dash means the model has no such figure.
It warms 1.6 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, 48 have a higher flow than this one.
In tests, 84% of the energy it uses ends up as hot water (UEF 0.84). When it runs, 98% of the energy it uses reaches the water (its recovery efficiency).
There is one more basic model with the same test figures. That one is listed under the A. O. Smith brand. For the full group, see the A. O. Smith R2VR-180E 1**.
Also listed as
They carry every figure in the table above.
- Every RELIANCE WATER HEATERS 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.