Carbon filters are no longer just for the ends of your air filtration system. Now they can be installed "in-line" like the lights and fans. It is the same Phresh® Carbon Filter users' trust, built into an air conserving body. Point to point air movement and filtration. Phresh® Inline Filters are state of the art carbon filters that practically scour the air to clean it of dust, foreign particulates, organic compounds and odors. Phresh® Inline Filters are twice as light and last twice as long.