Actual size is 1/2 less in height and width, and 1/4 less in thickness.Thats whats written also on the filter, when you get it.So profit maximization takes its toll.Especially when you need the size for a perfect fit, because MERV 11 does not work when the air passes by due to a sloppy fit.3 stars because customer care was nice to take it back and allow me to exchange to a custom fit, which fits.
The filters I purchased last time were a little different in size. The lady I talked to said they would fit. I wont be changing filters again until June so if they dont fit Ill be sending them back.
It is a surprise to me that they are larger than the ones I normally order in merv 8 why is that? Now I have to crush length and width of these to get them into my return air grille. Why????