Air Conditioning Contractors of America - representing heating, ventilation, air conditioning, and refrigeration contractors.
Air Diffusion Council (ADC) - trade association for flexible duct manufacturers and suppliers in North America.
Air-Conditioning & Refrigeration Institute - representing manufacturers.
American Boiler Manufacturers Association - ABMA represents manufacturers of commercial, industrial and utility steam generating and fuel burning equipment, as well as industry suppliers.
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE)
Associated Air Balance Council
Canadian Boiler Society (CBS) - trade association whose membership includes major boiler manufacturers and related companies.
Energy Efficient Builders Association Environmental Protection Agency
National Air Duct Cleaners Association (NADCA)
National Air Filtration Association
National Association of Home Builders
National Insulation Association
North American Insulation Manufacturers Association (NAIMA)
Refrigeration Service Engineers Society - association whose members install, service, and repair HVAC and refrigeration systems.
Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) - represents mechanical and sheet metal firms, and is responsible for developing technical standards for sheet metal and HVAC fabrication, manufacturing, and installation.
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