50 Gallon, Natural Gas Water Heater, 50,000 BTUs, Electronic Gas Control Valve, High Recovery Power Vent, Sidewall Venting Up To 12', Vents Using Inexpensive Schedule 40 PVC, CPVC, Or ABS Pipe, More Powerful Modular Blower With 110/120V Electrical System, Factory Installed 7' Power Cord, Advanced Intelli Vent Gas Control Valve, Glass Lined Tank With Heavy Duty Anode Rod Protects Against Corrosion, Non CFC Foam Insulation, Eco Friendly Green Choice Gas Burner That Reduces Nox Emissions By 33%, Factory Installed Pex Polymer Lined Heat Trap Nipples, Factory Installed T&P Relief Valve, First Hour Rating: 97 Gallons, Rated Storage Volume: 48, Water Connection Is Located At The Top Of The Water Heater, Water Connection Size: 3/4", Vent Size: 2", 3" Or 4", UEF: 0.72, EF: 0.70, Vent Size: 2", 3" Or 4", Unit Dimensions: 69-3/4"H x 22"D, 6 Year Limited Tank & Parts Warranty.