What is the proper way to seal a “B” vent in a attic floor?
The “B” vent is a 6” heater flue that services the gas foced hot air furnace in the basemet that is 80% efficent. The top of the chase is wide open in the attic. Can I seal the top of the chase with metal flashing and fire caulk? Will this create a fire hazard? I am in the Philadelphia area.
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