flexible duct versus rigid duct
Any comments on pros of one type of duct over the other? I am moving my entire system to the attic. The rigid duct costs about $700 more.
Also, one contractor want to mount the furnace on all thread rods connected to the roof rafters. Another contractors wants to mount on the ceiling joists. Any comments on the pros and cons of each method?
Finally one contractor said I could not put a 90% plus furnace in the attic because the condensate would freeze while the other contractor said this would not be a problem.