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?
That picture is kind of unclear but it certainly looks to me as if the drain (and maybe the whole a/c) was added as a retrofit to a furnace - the hole is uneven looking to me - sloppy. I have something similar myself, in fact.
In answer:
1) No, it's not normal - it' a waste. Air exchangers that are built to do both jobs do not have these kinds of gaps.
2) Yes - cut a piece of plastic to fit over the hole as much as possible. Seal in place using METAL tape (not duct tape), closing up all the remaining gaps.
