Lennox 32M65 Flue Collar Pipe

The Lennox 32M65 is a flue collar, which is a cylindrical metal pipe that connects a gas furnace It expels fumes generated from the HVAC equipment out of the house thus eliminating the circulation of bad air inside the home. Flue collars are normally used in gas furnaces as well as in oil fired boilers. it is quite possible that these are the dimensions of the opening the flue collar sits into rather than the dimensions of the collar itself.