What it delivers
The FOGATTI FDG-CF170G-NG Natural Gas Tankless Water Heater is a non-condensing gas tankless with a 170,000 BTU/h burner and a stated maximum flow of 7.5 GPM.
Flow depends on how cold the incoming water is. Our estimate from its input: 5.8 GPM at a 45°F rise, falling to 3.7 GPM at 70°F, which is 1 shower at 2 GPM on a cold-climate winter day. Run your house through the planner.
At full fire it burns about 164 cubic feet of natural gas an hour. The gas line has to carry that on top of the furnace, range and dryer; a gas fitter sizes the pipe from its length and the total load.
Its exhaust runs hot, so the vent must be the material its manual lists, usually stainless; budget for the vent kit.
Also on the listing: material: Natural Gas; model: FDG-CF170G-NG; warranty: 5 Year Heat Exchanger Warranty.
The listing gives dimensions of 17.1 in (W) x 26.2 in (H).
Warranty, per the listing: 5 Year Heat Exchanger Warranty.
Right unit for this house?
Install it when
- One shower at a time in cold climates
- Replacing a gas tank heater
Look at another unit when
- More than 1 winter shower at once
- Homes without a gas line
Strengths and trade-offs
Strengths
- 170,000 BTU/h input
- Up to 7.5 GPM
Trade-offs
- Needs a gas line sized for the load
- Stainless venting costs more
- Needs periodic descaling
Install limits
- Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.
Rated performance
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Model number | FDG-CF170G-NG | Retailer |
|---|---|---|
| Dimensions (seller) | 17.1"W x 26.2"H | Retailer |
| Voltage | 120 V AC | Retailer |
| Max flow (maker) | 7.5 GPM | Retailer |
| Input (maker) | 170,000 btu_per_hour_per_foot_per_fahrenheit | Retailer |
| Warranty | 5 Year Heat Exchanger Warranty | Retailer |
| Material | Natural Gas | Retailer |
| Fuel | natural gas | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
- VancEpic V-RH19K-NG 190,000 BTU Natural Gas Tankless Water Heater
- Ranein RH19K-NG 190,000 BTU Natural Gas Tankless Water Heater
- GASLAND E 199 199,000 BTU Natural Gas Tankless Water Heater
- ThermoMate CZ750NG Natural Gas Tankless Water Heater
Full gas tankless water heaters spec grid · Every FOGATTI unit in the catalog
Final verdict
A practical non-condensing gas tankless for one shower at a time in cold climates.
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