Bests & Worsts Reviews from Amazon

Filters are NOT the described size. They are SMALLER than listed and will not correctly replace OEM filters. Also, mine were also defective as the glue holding the ends of the filter paper to the frame had already let go, so there were gaps between the filter paper and the frame in which air could by-pass the filter entirely. Also, the shipping box was not reinforced on the corners, so where the corners of the shipping box were crushed, it meant that the filters inside were crushed also. Unless your a/c unit requires a filter that is smaller than 20x25x4, do not order - they will not fill the entire void in the duct, which mean air will just go around the filter.