Lochinvar® Gas Water Heater, Single-Flue Light Duty Charger, Series: CGN, 75100 Btu/hr Heating, Natural Gas, 1/2 in Gas Connection, 74 gal Tank, 4 in Vent, 81 gph at 90 deg F Rise Recovery, 80% Energy Efficient, 1 in Water Connection, 150 psi, 180 deg F, Ultra Low NOx: No, ASME(Yes/No): No, Glass Lined Steel, 26-1/2 in Dia x 61 in H