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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.