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02-21-2005, 10:00 PM #1
Can someone turn this into english: "when supply or return ducts pass through the floor, a 1/4 inch thick nocombustible resilient gasket must be used between the duct, unit and floor."
I'm also trying to figure out why most of the jobs I see don't have this gasket.
Why wouldn't register boots in floors/walls/celings need a gasket like this or does mastic sealant qualify.
None of the uppers I have talked to can explain this very good. Thanks for any help.