American Standard Gas Water Heater, Low Boy, Series: GSN, 37000 Btu/hr Heating, Liquid Propane, 40 gal Tank, Spark Ignition, Atmospheric Vent, 3 in Vent, 35 gph at 90 deg F Rise Recovery, 0.6 Energy Factor, 3/4 in NPT Water Connection, 150 psi, Tall or Short: Short, Ultra Low Nox: No, Glass Lined Steel, 22-3/8 in Dia x 49 in H