[smagown]

I've been removing my basement air duct work from under my coach since going to roof airs. The quality of material and insulation of the ducts is way beyond what is in my home.
One thing I don't understand is why Newell didn't run it straight up thru floor registers instead of going up the walls and then thru the black pipes. I think this may have hurt efficiency.
I know houses have long runs but probably more tonnage and fan capacity.