IQAir systems feature patented triple sealing technology. First, a unique manufacturing process ensures that the filter media is 100 percent sealed in the filter frame. Second, our patented 3D UltraSeal ensures perfect knife-edge-in-groove sealing between filter frame and housing. Third, individual seals on each housing module ensure an airtight housing. As a result, IQAir systems have a total system efficiency that is higher than the theoretical efficiency of conventional air cleaners.