Richmond Gas Water Heater, Inlet Connection Size: 3/4 in, Outlet Connection Size: 1/2 in, BTU Rating: 38000 Btu/hr, Gas Type: Natural Gas, 1.11 gpm, Tank Capacity: 40 gal, Energy Efficiency: 0.64, Heating Chamber Material: Stainless Steel, Recovery Rate: 38 gph at 90 deg F, Vent Type: Powered Damper, Vent Size: 3, 4 in, Water Connection Location: Top, Gas Connection Height: 14 in, Tank Height: 60-1/4 in, Emissions: Ultra-Low NOx, Dark Warm Gray, Dimensions: 19-3/4 in Dia, Includes: 19 ft Cord, 3-Prong Plug, Temperature and Pressure Relief Valve