What it delivers
The FOGATTI 120S Propane Outdoor Tankless Water Heater is an outdoor gas tankless with a 120,000 BTU/h burner and a stated maximum flow of 5.1 GPM.
Expect about 2.6 GPM with cold winter water (a 70°F rise) and 4.1 GPM when the inlet is milder (45°F rise); that is 1 shower at 2 GPM in January. Run your house through the planner.
At full fire it burns about 1.3 gallons of propane 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.
Outdoor units vent straight out of the cabinet, which saves the vent run and the wall penetration; plan for freeze protection and a pipe cover where winters bite.
The listing describes its venting as: Outdoor Installation.
Listed details: material: Liquid Propane; model: 120S; warranty: 5 Year Heat Exchanger Warranty.
The listing gives dimensions of 15.5 in (W) x 23.9 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
- Propane homes
- 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
- 120,000 BTU/h input
- Up to 5.1 GPM
- No vent pipe
Trade-offs
- Gas pipe sizing to confirm
- Needs freeze protection outdoors
- 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 | 120S | Retailer |
|---|---|---|
| Dimensions (seller) | 15.5"W x 23.9"H | Retailer |
| Voltage | 120 V AC | Retailer |
| Max flow (maker) | 5.1 GPM | Retailer |
| Input (maker) | 120,000 btu_per_hour_per_foot_per_fahrenheit | Retailer |
| Material | Liquid Propane | Retailer |
| Warranty | 5 Year Heat Exchanger Warranty | Retailer |
| Fuel | propane | Retailer |
| Venting | Outdoor Installation | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
- Camplux WA528 150,000 BTU Natural Gas Outdoor Tankless Water Heater
- Camplux WA686LP 199,000 BTU Propane Outdoor Tankless Water Heater
- Camplux WA686M-NG 199,000 BTU Natural Gas Outdoor Tankless Water Heater
- Westinghouse AMZ-HS120A1G-NG 120,000 BTU Natural Gas Outdoor Tankless Water Heater
Full gas tankless water heaters spec grid · Every FOGATTI unit in the catalog
Final verdict
A well-specified outdoor gas tankless for one shower at a time in cold climates.
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