Friedrich KWCFS carbon filters - 3 pack for Kuhl and Kuhl+ series - S chassis models Carbon filter 3-pack for Kuhl SS, ys and Es 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 SS, YS and ES 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