40 Gallon, Mobile Home, Natural Gas/Propane Water Heater, 35,500 BTU, Low Nox Emissions, Electronic Gas Control Valve That Provides Precise Temperature Control & Operational Status, Piezo Igniter Allows For Easy 1 Hand Pilot Ignition Without Matches, Pex Dip Tube, Glass Lined Tank With Anode Rod Protects Against Corrosion, Non-CFC Foam Insulation, Factory Installed Pex Polymer Lined Heat Trap Nipples, Factory Installed Temperature & Pressure Relief Valve, Not For Use In Inside Closets Where A Direct Vent Design Is Required, Water Connection Is Located On The Side Of The Tank, Water Connection Size: 3/4", Vent Size: 3" Or 4", Rated Storage Volume: 38, First Hour Rating: 59 Gallons, UEF: 0.58, EF: 0.62, Unit Dimensions: 61 3/4"H x 20"D, Meets HUD Requirements For Manufactured Housing,6 Year Limited Tank & Parts Warranty, 1 Year Labor Warranty, For Use With Roof Jack Vent Kit, TV #219-820, Not Included, But Recommended For Installation.