 ACI Central
 - Not-for-profit. Design review of fittings, boilers and pressure vessels for CRN registration in Canada.- Alberta Pressure Vessel Manufacturers' Association
- Provides a forum for the pressure vessel and heat exchanger manufacturing industry.
- Canadian GeoExchange Coalition
- Seeks to increase the number of installations of geoexchange HVAC systems in Canada.
- Hydronics Marketing Group
- Association of hydronic equipment manufacturers and contractors dedicated to rasing awareness of modern hot water heating in Canada.
- Air Conditioning Contractors of America (3)
- Air Diffusion Council (ADC)
- Trade association for flexible duct manufacturers and suppliers in North America.
- Air-Conditioning & Refrigeration Institute
- Representing manufacturers.
- American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) (7)
- Australian Home Heating Association
- Represents the wood and gas heating industry, with information on natural heating, chimneys and combustion fuels.
- Cooling Technology Institute
- Advocates and promotes the use of environmentally responsible Evaporative Heat Transfer Systems (EHTS) for the benefit of the public.
- Fluid Handling Representatives Association
- Local dealers of HVAC and fluid handling equipment. FHRA's network of experts offer parts, services, and technician training.
- Indoor Air Quality Association, Inc. (IAOA)
- Promotes the exchange of indoor environmental information, through education and research.
- Institute of Heating Refrigeration Air Conditioning Engineers (IRHACE)
- National Air Duct Cleaners Association
- NADCA was formed as a nonprofit association of companies engaged in the cleaning of HVAC systems.
- Refrigeration Service Engineers Society (1)
- Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) (4)
- Swedish Refrigeration Foundation (KYS)
- Founded to address problems concerning the ozone layer, the greenhouse effect, and energy problems.
- Taiwan Refrigerating and Air-conditioning Engineering Association of Republic of China
- Acts as an intermediary between government and the industry.
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