40 Gallon, Natural Gas, Ultra Low Nox Water Heater, 40,000 BTU's, Draft Diverter Outlet Size 3 With Integrated Adapter For 4 Vent Option, 1 Insulation, R Value 8.00, EF Rating .59, Factory Installed T P Valve, Unit Dimensions, 60 Tall x 19 Diameter, Complies With The South Coast Air Quality District Rule 1211, 6 Year Tank Parts Warranty. This item may require an additional freight surcharge. You will be contacted if that is the case.