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.