Navien NHW700-180AI-NG
Navien NHW700-180AI-NG is in the DOE listing as of Oct 19, 2026.
- Gas tankless water heater
- 2 listed models
Not listed as ENERGY STAR certified on Oct 19, 2026.
Its figures are also listed under Navien NHW700-180AE-NG.
Certified and advertised figures
- Flow at a 67°F rise
- 4.5gallons per minuteCertified
- Advertised flow
- 4.5gallons per minuteNavien, at a 67°F rise
- 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 4.3 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.
Advertised and certified figures
| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| UEF | 0.81 | 0.81 | Navien | Read Oct 4, 2026 |
| Flow | 4.5 gal/min at a 67°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 10.0 gal/min at a 30°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 8.5 gal/min at a 35°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 7.5 gal/min at a 40°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 6.6 gal/min at a 45°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 6.0 gal/min at a 50°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 5.4 gal/min at a 55°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 5.0 gal/min at a 60°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 4.6 gal/min at a 65°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 4.3 gal/min at a 70°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 4.0 gal/min at a 75°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 3.7 gal/min at a 80°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 3.5 gal/min at a 85°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 3.3 gal/min at a 90°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
| Flow | 3.0 gal/min at a 100°F rise | 4.5 gal/min at a 67°F rise | Navien | Read Oct 4, 2026 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| NHW700-180AI-LP | 0.81 | 4.5 | 84% | High |
| NHW700-180AI-NG | 0.81 | 4.5 | 84% | 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 4.5 gallons per minute. The median flow among gas tankless models is 4.8 gallons per minute. Among 487 gas tankless models, 319 give more flow at a 67°F rise.
As of Oct 19, 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 high (its draw pattern). 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, 84% of the energy used goes into the water (its recovery efficiency).
Its 2 model numbers are NHW700-180AI-LP and NHW700-180AI-NG. Its test figures match those of one other basic model. You can find the whole group on the page for the Navien NHW700-180AE-NG.
Also listed as
They carry every figure in the table above.
- Every Navien 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
- Changes to an advertised figure after the date beside it.