Continue enhancing the air quality in your home with an extra Carbon Filter for use with the Basement Air Purifier (Item No. 205079). The Carbon Filter eliminates volatile organic components, odors and gases found in homes. Recommended for rooms up to 400 sq. ft. Replace every 12 months. Extra Nano-Capture Filter (Item No. 205080) and HEPA Filter (Item No. 205082) available at SharperImage.com.