40 Gallon, Natural Gas Water Heater, 35,500 BTU, 2″ Insulation, For Installations From Sea Level To 10,100#39;, .62 Energy Factor, Recovery At A 90 Degrees Rise-Gallons/Hours 36, First Hour Rating 67, Draft Diverter Outlet Size 3″ With Integrated Adapter For 4″ Vent Option, T P Valve, Aluminum Anode Rod, Pex Polymer Lined Heat Trap Nipples, Pex Dip Tube, Glass Lined Tank, Next Generation FVIR Approved, Stainless Steel Flame Arrestor, Air Intake Entire Base Of Heater, Door Mounted Manual Reset TCO, Self Powered Honeywell Millivolt Generator Gas Control Valve Using A Thermopile In The Burner Assembly, Unit Dimensions 62″H x 20″D, 3 Year Tank 1 Year Parts Warranty, Not For Use In Mobile/Manufactured Homes, Will Void WarrantyFeatures 40 gallon. Natural gas water heater. 35500 btu. 2 in. Insulation. For installations from sea level to 10100 ft. 0.62 energy factor. Recovery at a 90 degrees rise-gallons/hours 36. First hour rating 67. Draft diverter outlet size 3 in. With integrated adapter for 4 in. Vent option. Temperature pressure relief valve. Heavy-duty anode rod protects against corrosion. Pex polymer lined heat trap nipples. Pex dip tube helps maintain efficiency. Glass lined tank. Stainless steel flame arrestor. Air intake entire base of heater. Door mounted manual reset tco. Self powered honeywell millivolt generator gas control valve using a thermopile in the burner assembly. Dimension – 24.13 l x 21.13 w x 61.81 h in. Item weight – 150 lbs. – SKU: TRVAL70211