Just wondering if any one had fixed there heat problem for the main bedroom for the 32qbss. The heat vent is hose is 2" while all the others are 4", and very little heat or air comes out. I just installed vent covers with lovers that close in the other rooms, this did not help. Wondering if I could run 4" line? Would not thinks so or heartland would have done this, must be 2" for a reason?