Closing duct runs that run past last vent
Our 36' TT only has 4 AC ceiling vents(MBR, Bath, LR and Bunkroom). It has a 15k BTU AC. When I popped off the ceiling vent in MBR and Bunkroom the duct works continues past the vent 3-4'. This see...
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The ends of my duct work, like Chris explained above, were not taped well and were leaking cool air into the attic space. I solved this problem by finding the correct diameter of foam pipe insulation. The round closed cell foam type. The diameter I chose was just a tad bigger than the height of the duct. I cut it just a tad longer than the width of the duct and ran it up through the last vent and placed in the duct. I pushed it about 6 inches beyond the last vent. Works perfect, no taping required and has been in my ducts for years.
