The Fellowes AeraMax DX95 Air Purifier uses 4-stage hospital-type filtration to effectively purify air in large rooms 300 - 600 square feet. The AeraSmart Sensor monitors the air quality and automatically adjusts the fan speed to keep your air purified with ultra-quiet operation. A True HEPA filter with AeraSafe antimicrobial treatment safely removes 99. 97% of airborne particles as small as 0. 3 microns. Backed by a 3-year manufacturer limited warranty. 4-stage hospital-type filtration: effectively purifies air in large rooms 300 - 600 square feet. AeraSmart sensor: monitors the air quality and automatically adjusts the fan speed to keep your air purified. True HEPA filter with AeraSafe antimicrobial treatment: safely removes 99. 97% of viruses, germs, allergens, mold and dust. Carbon filter: removes odors and captures large airborne particulates. PlasmaTrue Technology: optional setting that utilizes ionization to help safely remove airborne pollutants. Aera+ mode: increases air change by 50% for allergy and cold/flu seasons. Ultra-quiet operation. Filter indicator: light alerts when to change filters. Compatible with Hepa Filter 9287201. Compatible with Carbon Filter 9324201. Removes 99. 97% of airborne particles in large sized rooms 300-600 sq. ft.