Lochinvar® Commercial Gas Water Heater, Charger Multi-Flue, 199999 Btu/hr Heating, Natural, 1/2 in Gas Connection, 81 gal Tank, Spark Ignition, 6 in Vent Size, 193 gph at 100 deg F Recovery, 0.8 Energy Efficient, 1-1/2 in Water Connection, 150 psi, 180 deg F, Short Tall or Short, Glass Lined Steel, 27-3/4 in Dia x 67-1/2 in H