Carrier FE4,
Not looking to "puirify" the air, just keep My coils clean as possible, so I am keeping the stock filter bay in the fan coil. The piece that came with the unit looks like it would pass a small cat through it.
I am looking for the best filter I can put in there.

Some reason carrier insist on using odd size filters 16.5x20.5

The bulk order pleated filters have a cardboard frame, do to the tension of the "spring" that the filter pushes against to install it, the cardboard filter frame colapses.
So bulk disposables are out.

Can anyone recomend a really good perm filter.
Can perm washible filters compete with disposable pleated filters??

Just looking for the best filter I can put in the fan coils filter bay.

Nick