The Airgle AG800 exceeds CADR (Clean Air Delivery Rate) industry standards. CADR is the only air purifier standard that is recognized as an American National Standard. In an independent test performed by the Association of Home Appliance Manufacturers(AHAM), the AG800 achieved CADR ratings that are among the highest in the industry. Ideal for large rooms, the AG800’s proven ability to effectively remove a large variety of particulate and molecular air pollutants makes it one of our most popular air purifiers.