UncleBuck
Well-Known Member
only reason i don't want to go with square is because it will reduce air flow.Duct insulation with spray tack. I get it at mechanical supply house . Spray tack is like contact cement but it will stay tacky forever. Also I would just make it square, for easy build . The supply house might have premade duct that just needs assembly with s and c lock. And of course duct seal.
PS the insulation is for condensation also.
however, i suppose i could build it square and do something like this:
![14979124589577.png](/data/attachments/3064/3064004-fc5c2c21f2c96b594e9a4f54a0e318a8.jpg)