Intended for rooms approximately 700 square feet in size, the Blueair 603 air purifier is perfect for large family rooms, basements, and open workspaces. The Blueair 603 has the highest Clean Air Delivery Rate (CADR) in the industry at 450 cubic feet per minute for smoke, dust, and pollen, at a superior 5 air changes per hour. All Blueair units are independently tested and certified by the Association of Home Appliance Manufacturers (AHAM). The Blueair 603 uses HEPASilent filtration technology to capture 99.97% of harmful particles from the air down to 0.1 microns in size through a combination of electrostatic and mechanical filtration. Reducing draft and maximizing airflow, the Blueair 603 takes in air through an area six times greater than the average air purifier through a system called SurroundAir. Featuring a sleek Swedish design, the 603 blends seamlessly into your home. Equipped with casters so you can move your air purifier where you want it and includes a magnetic filter change indicator so you’ll never have to guess when your filter needs to be changed.