My house has a fresh air intake that is not dampered. I have a three story house and one system. I keep the fan on all the time to keep the air moving, the AC seems to cool the house and all the rooms are the same temp with the fan on constantly. I assume that the fresh are intake with the fan running constantly just takes in un-AC'd air causing the temp in the house to rise. I have taped over the intake and do notice a difference, question is...is this smart? My guess is that the intake brings in fresh air, so am I causing some type of bad air situation?
Also, shouldn't the intake be dampered? Thanks for your comments.