40 Gallon, Natural Gas/Propane Mobile Home Sealed-Combustion Water Heater, 32,000 Max BTUs, Low Nox Emissions, Eco-Friendly Green Choice Gas Burner, Reduces Nox Emissions By 33% Over Standard Burners, Piezo Igniter Allows For Easy 1 Hand Pilot Ignition Without Matches, Pex Dip Tube, Glass Lined Tank With Anode Rod Protects Against Corrosion, Environmentally Friendly Non CFC Foam Insulation, Factory Installed Pex Polymer Lined Heat Trap Nipples, Factory Installed Temperature & Pressure Relief Valve, Meets HUD Requirements For Manufactured Housing, Side Taps For Easy Installation, Rated Storage Volume: 38, First Hour Rating: 57 Gallons, Water Connection Is Located At The Top Of The Tank, Water Connection Size: 3/4", Vent Size: 3", Unit Dimensions: 58 3/4"H x 20"D, UEF: 0.59, EF: 0.59, 6 Year Limited Tank & Parts Warranty, For Use With Roof Jack Vent Kit, TV #219-820, Not Included, But Requried For Installation.