Replacement MERV 11 filters for the Santa Fe Advance (Original) dehumidifier by Therma-Stor. These filters are after-market, pleated filters. Sold in a case of 12 filters. THEY DO NOT FIT THE ADVANCE 2 UNIT Also available in a pack of 4 or in our Odor Ban filter that eliminates unpleasant odors from basements and crawl spaces. Remember to change filters frequently for optimum performance.