• Mechanical Contractors Association of America: www.mcaa.org
• Mechanical Service Contractors of America: www.mcaa.org/msca
• New England Mechanical Contractors Association: www.nemca.org
• New England Mechanical Service Contractors Association:
• National Certified Pipe Welding Bureau: www.mcaa.org/ncpwb/
• National Environmental Balancing Bureau: www.nebb.org
• American Society of Testing and Materials: www.astm.org
• American Society of Heating, Refrigeration, and Air Conditioning Engineers: www.ashrae.org
• National Fire Protection Association: www.nfpa.org
• Air Conditioning Contractors of America: www.acca.org
• Rhode Island Public Expenditure Council: www.ripec.com
• Rhode Island Chamber of Commerce: www.provchamber.com
• Building Owners and Managers Association: www.boma.org
• Sheet Metal and Air Conditioning Contractor's National Association: www.smacna.org
• The Unified Group: www.theunifiedgroup.com
• Building Services Institute: www.bsig.net

Unions