I'm trying to determine if I have a leak around my central AC unit. Basically when the unit is on, I feel cool air blowing outside the "furnace plenum" as I believe its called.
If you look at this picture, I think the air is coming from where the drain hose connects to the unit.
So my questions are:
1) Is this normal for air to be blowing out here 2) If not, is there a way I can seal it better?