Description
The A. O. Smith ATM-180M-N-100 is a 1-gallon residential gas tankless water heater that runs on natural gas.
Published ratings for this model include a Uniform Energy Factor (UEF) of 0.95, a flow rate of 5.4 GPM at a 67 F temperature rise and a maximum gas input of 180,000 BTU/h (minimum 10,000 BTU/h).
It measures 32.46 in. high x 17.12 in. W; ships at 93 lb. Warranty coverage listed by the manufacturer: 15-year limited heat exchanger, 5-year limited parts.
- Model number: ATM-180M-N-100
- Fuel: Natural Gas
- Nominal tank capacity: 1 gallons
- Flow rate: 5.4 GPM at 67 F temperature rise
- Maximum input: 180,000 BTU/h
- UEF: 0.95
- Electrical supply: 120 V
- Emissions class: Ultra-Low NOx
- Installation: Indoor or Outdoor
- ENERGY STAR certified
- Dimensions: 32.46 in. H x 17.12 in. W
- Warranty: 15-year limited heat exchanger, 5-year limited parts











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