No return on 3rd floor... problems with humidity?
Been reading these forums for a while but inactive up until now!
In the process of buying a condo now and there is no return air duct for the central AC/heat system on the 3rd floor of a roughly 1,000 sq. ft apartment.
I've read the system will be inefficient but also I've heard that something about the pressure being created will cause extra humidity, potentially causing trouble with mold creation.
Has anybody had any experience with this?
Another person said I shouldn't worry, given that the return is on the common area stairways on the first floor so the air will eventually escape through the door and all will be good.