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 airborne particles as small as 0.3 microns, including pollen, ragweed and other allergens, viruses, germs, dust mites, mold spores and cigarette smoke. Extremely effective at removing influenza and cold viruses from indoor air. Carbon filter removes odours and captures large airborne particulates. Certified asthma and allergy friendly by the Asthma and Allergy Foundation of Canada. Aera+? Mode for allergy and cold/flu seasons. Covers up to 400 sq. ft. 4 fan speeds. 129 CADR dust rating. 124 CADR pollen rating. 126 CADR smoke rating. 10.5 lbs. 13"W x 7-1/7"D x 20-1/2"H. 3-year limited warranty. White.