Filters are surprisingly as they are advertised. Not quite the heavy filter available in retail stores, but that is not what you are buying. I just put mine in... I have to wait to give longevity results. But day 1-7... air smells clean. Filter is doing it's job :-) Thank you
Great filters, great fit. I was able to convert from a 1" filter to a 4" filter with a little work on the return air filter grille. Happy wife, happy life.