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Old 03-05-2019, 10:55 AM   #2
ChuckS
Montana Master
 
Join Date: Dec 2017
Location: Mountain Home
Posts: 848
M.O.C. #20949
Sounds like you’ve got a lot of blow by where the furnace hoses mates with each of those floor ducts. Perhaps a better clamp around the hose where it mates under neath to the floor duct
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