Gas Tankless Water Heater Fuel Type Liquid Propane Low NOx Yes Cold Inlet Size 3/4 in Gas Inlet Size 3/4 in Maximum Flow Rate 12.1 gpm Maximum Heating Capacity 225 000 BTU/ft/sq ft/hr/ Degrees F Minimum Flow Activation 0.5 gpm Overall Depth 11.25 in Overall Height 30.5 in Overall Width 17.88 in Maximum Delivered Temperature 180 Degrees F Minimum Delivered Temperature 100 Degrees F Thermal Efficiency 98 Percent Condensing Yes Environment Indoor Outdoor Market Commercial