Marketing InformationPrePleat AC filter with activated carbon operates like an odor sponge. This versatile filter is an excellent choice in commercial/industrial settings for remediation of minor odor problems. This filter combines the low resistance and high DHC of a pleated filter with the odor removing abilities of activated carbon. The base filtration medium is polyester synthetic fiber, with a generous 100% add-on of activated carbon by weight (the weight of activated carbon equals the weight of the media to which it is adhered). As odor producing gases come in contact with the activated carbon in the filter, they are adsorbed, trapped and held in millions of microscopic carbon pores.