So I have been buying 16x25x4 filters for years..just by the size on the filter..they fit fine and worked well..but your filters were thinner by an inch..WDF????sooooo I got the number off the filter cover plate and it converted to 16X25X5.not cool
I was looking for a very particular size filter......it was generically a 24" x 24", but because they listed the exact finished sizes, I knew it would fit a special filtering box we had fabricated (23 1/2" x 23 1/2")
We all need furnace/air handler filters. Then we are late o. The change. Filterbuy takes a big chunk out of this job. I always have a filter on hand, the right size and when I need more I find the right email and re order. EZ. And a quality product. My used filters are less encrusted and thats good.