The installer of my replacement system was chosen because of his more thorough inspection of the house. However one thing surprised me. He says he will hang the atic air handler from the rafters rather than setting it on the attic floor. I understand that this would be good practice to keep insulation from clogging up the condensate drains but is the first time I heard of this. Do you "go to guys" have any comments one way or another? I would appreciate any input.