This item cannot be shipped to the following state(s): AK,GU,HI,PR,VI
MERV RATING: 11 - FPR "Filter Performance Rating": 6 - Specifically Designed to Fit: Trion Air Bear 435790-027, Aprilaire/Space-Gard 2200 and 2250, and Skuttle DB-25-20 Air Cleaner Housings. 53 times more effective than fiberglass filters and will last up to 1 year. Filters are assembled with a heavy duty frame that prevents collapsing of the filter during installation. 36% More Filter Material Compared to Other Brands. During the manufacturing process, we charge the filter media with an electric current. This process allows the filter to attract very small particles much the same way magnets attract metal. The end result is a far more effective filter. The Electrostatically Charged filter media filters sub-micron airborne allergens like dust, dirt, pollen, pet dander, dust mite debris, microscopic allergens, smoke and smog. 100% Synthetic filter media will not support the growth of Bacteria, Mold, or Fungi in normal use.