Fogatti FDG-CS120
Fogatti FDG-CS120 is in the DOE listing as of Oct 26, 2026.
It has a certified UEF of 0.82–0.84 and a certified flow of 2.9–3.0 gal/min at a 67°F rise.
- Gas tankless water heater
- 2 listed models
Not listed as ENERGY STAR certified on Oct 26, 2026.
Certified figures
- Flow at a 67°F rise
- 2.9–3.0gallons per minute
- UEF
- 0.82–0.84Uniform energy factor
The 2 listed models differ. A range runs from the lowest figure to the highest.
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 2.8 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 |
|---|---|---|---|---|
| FDG-CS120AG-LP | 0.84 | 3.0 | 83% | Medium |
| FDG-CS120AG-NG | 0.82 | 2.9 | 81% | Medium |
UEF is the uniform energy factor. A dash means the model has no such figure.
Its flow at a 67°F rise is 2.9 to 3.0 gallons per minute, by model number. The median gas tankless model heats 4.8 gallons per minute by 67°F. Its flow at a 67°F rise trails 467 of the 487 gas tankless models.
As of Oct 26, 2026, it was not listed as ENERGY STAR certified. Its listed models turn 82 to 84% of the energy used into hot water (UEF 0.82 to 0.84). Its test simulated a day of medium hot water use (its draw pattern). Among 77 gas tankless models on its draw pattern, 21 have a higher UEF. For its type and draw pattern, the UEF runs from 0.81 to 0.97.
It is sold as FDG-CS120AG-LP and FDG-CS120AG-NG. All of its test figures are shared by 3 other basic models. The Mizudo, ORBEK, and Westinghouse brands list one or more of them.
It may qualify for one rebate program 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 |
Programs change their terms. Check the program's own page before you buy.
- Every Fogatti 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
- Advertised figures. We have none on file for this model.