Battle allergies, asthma and hay fever with HEPASilent technology which leverages electrostatic charge and mechanical filtration to deliver true HEPA performance capturing 99.97% of air airborne pollutants including dust, mold, pet dander, pollen. Certified clean air delivery rate (CADR) of 500 cubic feet per minute with a superior, 5 air changes per hour 3 fan speeds including whisper quiet operation allow you to breathe and sleep easier without disruption Wifi enabled for control through your Blueair friend app and Amazon Alexa compatible For large rooms between 700 sq. ft. and 800 sq. ft. (AHAM rated at 775 sq. ft.) such as large bedrooms, living rooms, and kitchens Dual Protection filters, sold seperately, provide an extra level of carbon filtration to remove odors and smoke including those caused by wildfires. All filters are recyclable and suggested to be replaced every 6 months depending on use