Description
The A. O. Smith ATHR-199M-100 is a 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 5.9 GPM at a 67 F temperature rise and a maximum gas input of 199,000 BTU/h (minimum 9,000 BTU/h).
It measures 34 in. high x 16.53 in. W; ships at 125 lb. Warranty coverage listed by the manufacturer: 15-year limited heat exchanger, 5-year limited parts.
- Model number: ATHR-199M-100
- Fuel: Natural Gas
- Flow rate: 5.9 GPM at 67 F temperature rise
- Maximum input: 199,000 BTU/h
- UEF: 0.95
- Electrical supply: 120 V
- Emissions class: Ultra-Low NOx
- Installation: Indoor or Outdoor
- ENERGY STAR certified
- Dimensions: 34 in. H x 16.53 in. W
- Warranty: 15-year limited heat exchanger, 5-year limited parts











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