616 Advantage Series, 40 Gallon, Natural Gas, Water Heater, Short, 40,000 BTU's, Energy Factor .59, D-Rated To 7,000',Draft Diverter Outlet Size 3" With Integrated Adapter For 4" Vent Option, Sediment Reducing Dip Tube, Factory Installed T & P Valve, Glass Lined Tank, Energy Factor .59, 6 Year Tank & Parts Warranty, 1 Year Labor Warranty, FVIR Approved, Unit Dimensions: 52-1/4" Tall x 20" Diameter.