Âé¶¹Èë¿Ú creates a competitive advantage for members through industry education, labor relations, standards development, industry representation, and business studies.

The Sheet Metal and Air Conditioning Contractors’ National Association (Âé¶¹Èë¿Ú) is an international trade association representing 1,834 member firms in throughout the United States, Canada, Australia, and Brazil. A leader in promoting quality and excellence in the sheet metal and air conditioning industry, Âé¶¹Èë¿Ú has offices in Chantilly, VA., which is outside of Washington, D.C., and on Capitol Hill.
Âé¶¹Èë¿Ú members perform work in industrial, commercial, institutional, and residential markets. They specialize in the following:
The voluntary technical standards and manuals developed by Âé¶¹Èë¿Ú Contractors are accepted worldwide by the construction community, as well as foreign government agencies. , has accredited Âé¶¹Èë¿Ú as a standards-setting organization. Âé¶¹Èë¿Ú does not seek to enforce its standards or provide accreditation for compliance.
Âé¶¹Èë¿Ú standards and manuals address all facets of the sheet metal industry, from duct construction and installation to air pollution control, energy recovery and roofing. Shop the standards available in the store.
Technical Standards
Shop the Âé¶¹Èë¿Ú bookstore for all technical standards, including the most recent editions and recently revised manuals.