Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) An international trade association representing 4,500 contributing contractor firms, that promotes quality and excellence in the sheet metal and air conditioning industry within North America. Provides a list of members, benefits, news and resources. http://www.smacna.org/
Air Conditioning & Mechanical Contractors Association of Queensland (AMCA-Q) Representing the interests of its members in their chosen field of business within Queensland, Australia. Seeks to improve the flow of information about the industry to non-members, the general public and government. http://www.amcaqld.com.au/