VOC air purifiers rely on the collection and filtration of VOCs produced by industrial fumes. They work through the process of gas adsorption. Gas adsorption is when gas molecules cling to the surface of a solid particle. Activated carbon is a perfect material for gas adsorption, as gases readily stick to the surface of activated carbon. Our gas adsorption systems use activated carbon in the filter media in order to eliminate harmful gas vapors from the air. One important factor for choosing filter media for gas adsorption and odor removal is to look at its activity level. Activity is defined as the ability of activated carbon to adsorb a gas or vapor. IP Systems USA recommends filter media with activated carbon activity levels of at least 60%. Our VOC air purifiers are part of larger fume extraction systems, which also deal with the collection and filtration of particulate matter. For this reason, our VOC air purifier systems also have a HEPA filter base. We provide filter configurations with 55 lbs of activated carbon, as well, for use in applications such as painting.