I have two spots where I can place the A/C filter. My intake openening
However, that only leads to 20"x30"x15" box from which the 20"x15" chute
that goes to the unit comes off. So I can either use a 20"x30" filter
right at the opening or at 20"x15" filter right in front of the chute
that goes to the unit.
What's the better filter size and location to use?
Many thanks in advance!
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