NADCA The National Air Duct Cleaners Association, an active non-profit trade association, is dedicated to the continuous progression of the Heating Ventilation and Air Conditioning (HVAC) hygiene industry. IAQA The Indoor Air Quality Association (IAQA) is a nonprofit, multi-disciplined organization, dedicated to promoting the exchange of indoor environmental information, through education and research, for the safety and well being of the general public. IICRC The IICRC is a nonprofit certifying body for the inspection, cleaning and restoration industry. Organized in 1972, the IICRC currently represents over 3,900 certified firms and 21,500 certified technicians in nine countries. The IICRC, with participation from the entire industry, sets standards for inspection, cleaning and restoration. ASCR The Association of Specialists in Cleaning and Restoration, Inc. (ASCR) is the leading trade association for cleaning and restoration professionals worldwide, and the foremost authority, trainer and educator in the industry.