Commercial Gas Water Heater, Fuel Type Natural Gas, Low NOx Yes, First Hour Rating 125 gal, Gas Inlet Size 1/2 in, Maximum Heating Capacity 75, 100 BTU/ft/sq ft/hr/ Degrees F, Overall Height 64 in, Tank Diameter 26.25 in, Included Valves Drain, Temperature and Pressure Relief, Tank Capacity 75 gal, Hot Outlet Size 1 in, Maximum Recovery Flow Rate 182 gph @ 40 Degrees F, Market Commercial, Vent Type Standard, Automatic Thermostat Yes. This item has been restricted from sale in the following state (s): []