i moved in to a house and some one disconected the heat duct from one side it has heat on one side of the house and not the other. so i bought a 25ft peice of insulated flex duct i just finshed hooking it up and the heat on the one side is great but the other side is not so great so whata YOU think
What are the rectangular dimensions (or round diameter) of the ducts that you hooked to on both ends, what is the size of the diameter of flex duct you used, is that 25' run going through unconditioned space, and is the piece you ran actually 25'? Also, what part is now cold, the part that used to be warm, or the part you are trying to get heat to?
When using flex duct remember to keep it from sagging or kinking.