Blueair 201CF Carbon Filter

Carbon Filter for Blueair Hepasilent Air Purifier 201. A carbon filter is a filter that contains highly activated carbon. This filter is recommended for use in rooms where heavy gaseous polluntants such as cigarette smoke or VOCs (Volatile Organic Compounds) are present. On first use, you may notice a slight odor coming from the active carbon; this will dissipate quickly.