AAF offers the largest direct sales force in the industry. AAF IAQ Professionals have completed a structured education program designed to make them experts in air filtration. In addition, AAF provides continuing education to maintain its IAQ Professionals as the best and most knowledgeable in the industry. Most important to you. These IAQ Professionals are willing to share their knowledge. They are available to conduct seminar and classes on any aspect of air filtration as it relates to your business.