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14x18x1 Air Filter Sticks Out

14x18x1 Air Filter Sticks Out

14x18x1 Air Filter Sticks Out

I found some 14x18x1 air filters at Wal-Mart and bought them. However, after getting home I noticed they didn't quite fit (even though the unit came with it). It seems as though a 12x18x1 air filter would actually fit better after inspecting around the edges. It pokes out right now and I would have to force it.

Update: What I do now is use a hammer to smash the corners down. Now, these orange 14x18x1 filters will slide all the way the down.  The purple version of these filters aren't as thick and will slide all the way down.