32", Adjustable, Roof Jack Vent Kit, For Manufactured Housing Water Heaters, Includes Air Inlet Vent, Aluminum Construction, Direct Vent, Sealed Combustion Heater Kit Must Be Installed In Accordance With The Instructions Furnished With The Manufactured Housing Direct Vent Gas Water Heater, No Other Roof Jack Or Air Inlet Assemblies Are Approved For Installation With The Manufactured Housing Direct Vent Gas Water Heater, Roof Jack Vent Is Required For Use With TV #'s: 198-008, 198-006, Also Recommended To Be Used With TV #198-005 & TV #198-007.