We have been using these filters for about 2 years now. I suffer from severe allergies and these filters have helped out tremendously! Filter buy filters are a must have in our house!
Took measurements of the return air opening as the last time I ordered there was a 1-2 inch gap from those filters. This time filters are1-2 inches too long and dont fit. Not sure how these filters are measured but something is not right on the website as even rounding down didnt help.