High-quality charcoal filter for use with Faber Inca Smart 240 CFM range hoods. To be used when recirculating the air back into the kitchen. Filters out odor and should be replaced every 6 months. Some ductwork is required to exhaust the unit out of the cabinet. Compatible with the following range hood models: INSM21GR240, INSM28GR240, INSP28SS240.