MBM Ideal Filter Cassette For AP45 Air Purifier is professional air cleaner with individually replaceable high-quality filter elements. Filters pollutants such as fine dust, pollen and acarid allergens, pathogens such as viruses, bacteria, and mold spores, cigarette smoke, exhaust fumes, chemical vapors, and odors from the air. The antimicrobial CleanCel equipment of the device and the antimicrobial coating "MedShield" of the HEPA filter inhibit the growth of microbes and removes pathogens.