A. O. Smith ATO-540H-N Outdoor Natural Gas Ultra-Low NOx Condensing Tankless Water Heater
199,000 BTU tankless gas water heater with Ultra-Low NOx emissions
• 199,000 BTUs
** This is the maximum output temperature, not a minimum. The actual output temperature depends on the water flow rate and incoming water temperature.
This model is 100% identical to the American GT-540-NEH. The only difference is the label.