Rinnai RE140I (REU-VE1720FFD-US)
Rinnai RE140I (REU-VE1720FFD-US) is in the DOE listing as of Oct 26, 2026.
It has a certified UEF of 0.81 and a certified flow of 3.1 gal/min at a 67°F rise.
Its certified flow is 3.1 gal/min at a 67°F rise, while Lowe's advertises 5.3 gal/min, no rise stated (Archived copy, May 11, 2026), so a comparison at the same rise is not possible.
- Gas tankless water heater
- 1 listed model
Not listed as ENERGY STAR certified on Oct 26, 2026.
Certified and advertised figures
- Flow at a 67°F rise
- 3.1gallons per minuteCertified
- Advertised flow
- 5.3gallons per minuteSupplyHouse, up to, no rise stated
- 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 3.0 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 | 0.81 | 0.81 | Lowe's | Archived copy, May 11, 2026 |
| UEF | 0.81 | 0.81 | SupplyHouse | Archived copy, Dec 3, 2023 |
| UEF | 0.81 | 0.81 | The Home Depot | Archived copy, Apr 18, 2024 |
| Flow | 5.3 gal/min, no rise stated | 3.1 gal/min at a 67°F rise | Lowe's | Archived copy, May 11, 2026 |
| Flow | up to 5.3 gal/min, no rise stated | 3.1 gal/min at a 67°F rise | SupplyHouse | Archived copy, Dec 3, 2023 |
| Flow | 5.3 gal/min at a 35°F rise | 3.1 gal/min at a 67°F rise | The Home Depot | Archived copy, Apr 18, 2024 |
| Flow | 5.2 gal/min at a 45°F rise | 3.1 gal/min at a 67°F rise | The Home Depot | Archived copy, Apr 18, 2024 |
| Flow | 4.2 gal/min at a 55°F rise | 3.1 gal/min at a 67°F rise | The Home Depot | Archived copy, Apr 18, 2024 |
| Flow | 3.6 gal/min at a 65°F rise | 3.1 gal/min at a 67°F rise | The Home Depot | Archived copy, Apr 18, 2024 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| RE140I (REU-VE1720FFD-US) | 0.81 | 3.1 | 83% | Medium |
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 3.1 gallons per minute. The median flow among gas tankless models is 4.8 gallons per minute. Its flow at a 67°F rise trails 465 of the 487 gas tankless models.
As of Oct 26, 2026, it was not listed as ENERGY STAR certified. In tests, 81% of the energy it uses ends up as hot water (UEF 0.81). In the test, daily hot water use was set to medium (its draw pattern). Of 77 gas tankless models with the same draw pattern, 48 have a higher UEF. For its type and draw pattern, the UEF runs from 0.81 to 0.97. When it runs, 83% of the energy it uses reaches the water (its recovery efficiency).
- Every Rinnai basic model
- Every gas tankless water heater certified below 4.0 gallons per minute
- Every gas tankless water heater
- The most-searched gas tankless models side by side
Not covered
- Changes to an advertised figure after the date beside it.