Friedrich KWCFL carbon filters - 3 pack for Kuhl and Kuhl+ series - L chassis models Carbon filter 3-pack for Kuhl sl, yl and El models More than double the filtration of standard foam and Mesh filters Filter effectiveness ratings up to MERV 6 Captures allergens such as dust, mold spores, pet dander, dust mites and pollen Adsorbs odors, ozone and volatile organic compounds Carbon filter 3-pack for Khl SL, YL and EL models More than double the filtration of standard foam and mesh filters Filter effectiveness ratings up to MERV 6 Captures allergens such as dust, mold spores, pet dander, dust mites and pollen Adsorbs odors, ozone and volatile organic compounds