Weird topic, but shortly after we moved into our house, I noticed that we have two apparently non-standard air returns. The openings measure 5.5 x 13.5 inches, and so we need filters that are 5.375 x 13.375 inches. Unfortunately, I haven’t been able to find anything to fit these dimensions.
We’ve always used the cheap spun glass filters and swapped them out every 30 days or so. Since the move, I’ve been doing the same thing for the standard air returns, but for the odd-shaped returns I’ve been pulling the filters out monthly, vacuuming them, and sticking them back in. While that’s been a workable short term solution, I’d like to actually solve this problem.
From what I can tell, the previous owners had custom filters made, and I’ve found a couple of places online that offer to do this for you. The problem is that it’s fairly costly… While you can get standard filters for $2 apiece, the prices for custom cut filters start around $6 each. On the other hand, cutting the filters down and then re-attaching the cardboard ‘frame’ isn’t as easy as it looks, so… I was wondering if anyone has any suggestions? Either a cheaper source for 5.375 x 13.375 inch filters, or perhaps another solution entirely?