Here's the inside of the old one...its supposed to be yellow
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20200610_111853-resized-1024.jpg [ 284.87 KiB | Viewed 4865 times ]
My plan to save height is making the job hard and the HVAC supply house made it harder saving me money. I had spec'd 5 foot sections....not really thinking but it's what homedepot stocks and my plan was screw the duct ro the top joints from the inside so no hangers below. The supply house told me they could get me 8ft sections, so cheaper and less to assemble which sounded great....but they are pretty heavy and awkward for 1 person and too long to just screw at the ends as I planned so I'm putting up the top piece and screwing in place, then fighting to snap the bottom on....5ft sections next time...
It seems to be working though. The 1 run is almost done and I have 2 x 8.375 screwed up along side, this will hold the drywall tight to the bottom of the ducts...at least in theory, and I'll have clean ducts and 3.5" more ceiling height than if I left the old and drywalled under it.....but ductwork sucks.