Commercial Gas Water Heater Fuel Type Natural Gas Low NOx Yes First Hour Rating 284 gal Gas Inlet Size 3/4 in Maximum Heating Capacity 199 900 BTU/ft/sq ft/hr/ Degrees F Overall Height 70.06 in Tank Diameter 26.38 in Included Valves Drain Temperature and Pressure Relief Tank Capacity 80 gal Hot Outlet Size 1 1/2 in Maximum Recovery Flow Rate 576 gph @ 40 Degrees F Market Commercial Vent Type Direct Vent Power Vent Compatible Systems and Services EcoNet Condensing Yes