KFI 300 175 cfm Carbon Filter (Plastic) (GL300) is a Kootenay Filter Inc (KFI) carbon filter built for serious odour control in grow tents and rooms. It is filled with high-quality activated carbon that traps smells as air is pulled through by an inline fan. Sized for systems in the around 175 CFM of airflow range, it’s ideal for matching with a fan of similar capacity for balanced performance. Use it on your exhaust line or as a recirculating scrubber to keep your space smelling clean and discreet.