AmAir/C, CPlus, CP, and AmAir/Oxi filters are more effective than other odor control filters because they contain more chemical media up to 50 times more. The effectiveness of any odor control filter corresponds to the density (weight per square foot) of activated carbon contained in the product. AmAir?/C, CPlus, CP, and AmAir?/Oxi filters are more effective than other odor control filters because they contain more chemical media