30 Gallon, Short, Natural Gas Water Heater, 35,500 BTUs, Electronic Gas Control Valve, Piezo Igniter, Glass Lined Tank & Anode Rod, Non CFC Foam Insulation, Factory Installed 3/4" Pex Polymer Lined Heat Trap Nipples & Temperature & Pressure Relief Valve, Rated Storage Volume: 28, First Hour Rating: 68 Gallons, Recovery At A 90 Degree Rise: 36 Gallons Per Hour, Water Connection Is Located At The Top Of The Tank, Water Connection Size: 3/4", Vent Size: 3" Or 4", UEF: 0.58, EF: 0.63, Unit Dimensions: 50"H x 18"D, 6 Year Limited Tank & Parts Warranty.