: Thanks for that info. After the A/C fiasco I will definitely look into the heating ducts even though in my area of S.W. Ga. heat would be seldom used. At this point I do know that they are the clear type very thin flexible ducts. In the past I have used some 4" flex duct that comes with fiberglass insulation made onto it and I know where to get it, will use that.
: I found the original post on this forum somewhere, I know I did. I even showed the post and photos to my g'friend and she remembers seeing it. I have looked again but have not found it. The post was rather long with a lot of good photos of that individual's findings and solutions. As I stated in post #4 a friend of mine found this same problem in his '16 Jayco unit. He also states that he could tell a significant increase in air flow by sealing up the duct work where it meets the A/C unit. How much cooled air is being lost in all the units out there with poor attempts at sealing up this area, or worse not sealing it at all?