» 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/

» California Association of Sheet Metal and Air Conditioning Contractors (CAL-SMACNA)
   A non-profit trade association representing union sheet metal and air conditioning contractors in California. Trade news, members directory, and an events calendar are provided.
   http://www.cal-smacna.org/

» 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/