Not sure where to post this question, but I'm sure someone here will know....
I have a 2 story house, with the air handler, and main intake, upstairs.
Downstairs, the only intake is in a bedroom and it is only a small 12x12 opening.
This is the room that we gave to my mother. The trouble is that she always keeps her slider open (even when it's 90* outside). I've weatherstipped her bedroom door (go ahead, laugh....) and I change the filter in that intake twice as often as the main one cuz of dust, etc....
But what I can't stop is all the humidity that is being pulled into that intake.

Sooooooooo...........

Can I just block it off altogether? At this point, I think it actually does more harm, than good. My thoughts are, YES, BLOCK IT OFF, but I thought I'd throw it out there for you guys to consider.