Ruud RTG-70XLN-1
- Gas tankless water heater
- 2 listed models
Not listed as ENERGY STAR certified on Oct 26, 2026.
Its figures are also listed under Navien NHW700-160AE-NG.
Certified figures
- Flow at a 67°F rise
- 4.0gallons per minute
- UEF
- 0.81Uniform 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 3.8 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 |
|---|---|---|---|---|
| RUTG-70XLN-1 | 0.81 | 4.0 | 84% | High |
| RUTG-70XLNWA-1 | 0.81 | 4.0 | 84% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
It warms 4.0 gallons per minute of water from 58°F to 125°F in the test. The median gas tankless model heats 4.8 gallons per minute by 67°F. Its flow at a 67°F rise trails 385 of the 487 gas tankless models.
It was not listed as ENERGY STAR certified on Oct 26, 2026. In tests, 81% of the energy it uses ends up as 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. For its type and draw pattern, the UEF runs from 0.81 to 0.98. While it heats water, 84% of the energy used goes into the water (its recovery efficiency).
It is sold as RUTG-70XLN-1 and RUTG-70XLNWA-1. Its test figures match those of 4 other basic models. Of those, one or more are under the Navien and Richmond brands. You can find the whole group on the page for the Navien NHW700-160AE-NG.
Also listed as
They carry every figure in the table above.
- Every Ruud basic model
- Every gas tankless water heater certified at 4.0 to 4.9 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.