RELIANCE WATER HEATERS T-H3-DV-N 1**
RELIANCE WATER HEATERS T-H3-DV-N 1** is in the DOE listing as of Oct 19, 2026.
- Gas tankless water heater
- 6 listed models
Not listed as ENERGY STAR certified on Oct 19, 2026.
Its figures are also listed under A. O. Smith T-H3-DV-N 1**.
Certified and advertised figures
- Flow at a 67°F rise
- 5.8gallons per minuteCertified
- Advertised flow
- 5.8gallons per minuteRELIANCE WATER HEATERS, at a 67°F rise
- UEF
- 0.93Uniform 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 5.6 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 | 0.93 | 0.93 | RELIANCE WATER HEATERS | Read Oct 4, 2026 |
| Flow | 5.8 gal/min at a 67°F rise | 5.8 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 |
|---|---|---|---|---|
| TS-540-GIH 1** | 0.93 | 5.8 | 96% | High |
| TS-540-LIH 1*1 | 0.93 | 5.8 | 96% | High |
| TS-540P-GIH 1** | 0.93 | 5.8 | 96% | High |
| TS-540P-LIH 1*1 | 0.93 | 5.8 | 96% | High |
| TS-540X3-GIH 1** | 0.93 | 5.8 | 96% | High |
| TS-540X3-LIH 1*1 | 0.93 | 5.8 | 96% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
It heats 5.8 gallons per minute of water by 67°F in the test. The median gas tankless model heats 4.8 gallons per minute by 67°F. Of 487 gas tankless models, 26 have a higher flow than this one.
On Oct 19, 2026, this heater was not listed as ENERGY STAR certified. In tests, 93% of the energy it uses ends up as hot water (UEF 0.93). In the test, daily hot water use was set to high (its draw pattern). Its UEF is lower than that of 196 of the 399 gas tankless models with its draw pattern. On its draw pattern, its UEF is also the median gas tankless UEF. Of the energy it spends heating water, 96% ends up in it (its recovery efficiency).
It is sold under 6 model numbers in all. There are 7 more basic models with the same test figures. Each of them is listed under a different brand. For the full group, see the A. O. Smith T-H3-DV-N 1**.
It may qualify for 2 rebate programs in 2 states. Another 2 rebate programs may accept it if it meets their other terms.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program page |
|---|---|---|---|
| SoCalGas High-Efficiency or ENERGY STAR Certified Natural Gas Tankless Water Heaters rebate | CA | May qualify if it meets the other terms | Its own page |
| Xcel Energy MINNESOTA RESIDENTIAL ENERGY EFFICIENCY PROGRAMS (gas storage, gas tankless) | MN | May qualify | Its own page |
| PSE&G Tankless Water Heaters | NJ | May qualify | Its own page |
| Focus on Energy (gas tankless) | WI | May qualify if it meets the other terms | Its own page |
Programs change their terms. Check the program's own page before you buy.
- Every RELIANCE WATER HEATERS basic model
- Every gas tankless water heater certified at 5.0 to 5.9 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.