DiversiTech CVENT-3 Concentric Vent Termination Kit 3 in
3 Inch Diameter Concentric Vent - The Concentric Vent allows both the intake for combustion air and the exhaust vent to pass through a standard roof or sidewall. This is an alternative to the standard two pipe intake/vent shown in the basic furnace installation instructions. CVENT-3 is for use with 3 inch intake/vent systems.