Do they make a window air conditioner that doesn't let all the little
nit flies through it? I have no leaks around the sides, top or bottom. I
also have the space between the sashes covered. The only way they can
get in is through the intake outside and through the other side into the
room. I tape a screen over the intakes outside and this year I put a
screen over the cooling vents. One nit fly so far.
My window unit (it cools only the bedroom - installing it cut my power bill
by 2/3rds) has no path for that noxious "outside air."
If yours has an "fresh air" setting, turn it off. In the alternative, I
suppose you could jury-rig a filter on the output side.
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