Takagi T-H3M-DV-N 1**
Takagi T-H3M-DV-N 1** 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 A. O. Smith T-H3M-DV-N 1**.
Certified figures
- Flow at a 67°F rise
- 3.3gallons per minute
- UEF
- 0.90Uniform 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 3.2 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 |
|---|---|---|---|---|
| Flow | 5.4 gal/min at a 40°F rise | 3.3 gal/min at a 67°F rise | SupplyHouse | Archived copy, May 15, 2025 |
| Flow | 4.4 gal/min at a 50°F rise | 3.3 gal/min at a 67°F rise | SupplyHouse | Archived copy, May 15, 2025 |
| Flow | 3.8 gal/min at a 60°F rise | 3.3 gal/min at a 67°F rise | SupplyHouse | Archived copy, May 15, 2025 |
| Flow | 3.2 gal/min at a 70°F rise | 3.3 gal/min at a 67°F rise | SupplyHouse | Archived copy, May 15, 2025 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| T-H3M-DV-N 1** | 0.90 | 3.3 | 94% | Medium |
| T-H3M-DV-P 1*1 | 0.90 | 3.3 | 94% | 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 3.3 gallons per minute. The median flow among gas tankless models is 4.8 gallons per minute. Its flow at a 67°F rise trails 451 of the 487 gas tankless models.
On Oct 19, 2026, this heater was not listed as ENERGY STAR certified. In tests, 90% of the energy it uses ends up as hot water (UEF 0.90). Its test ran at the medium level of daily hot water use. Among 77 gas tankless models on its draw pattern, 8 have a higher UEF. For its type and draw pattern, the UEF runs from 0.81 to 0.97. While it heats water, 94% of the energy used goes into the water (its recovery efficiency).
It is the basic model for T-H3M-DV-N 1** and T-H3M-DV-P 1*1. All of its test figures are shared by 6 other basic models. Each of the 6 other brands lists one of them. For the full group, see the A. O. Smith T-H3M-DV-N 1**.
In 2 states, 2 rebate programs may accept it. It may qualify for 2 more if it meets terms its figures do not show.
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 Takagi 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.