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The following organizations are just of a few of the many that can provide additional information and resources pertaining to heating and ventilation regulations, codes and other issues.

Air Conditioning Contractors of America (ACCA) represents 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 (ARI) is a national trade association representing manufacturers of more than 90% of North American produced central air-conditioning and commercial refrigeration equipment.

American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE)

American Society of Mechanical Engineers (ASME)

The American Society of Professional Estimators (ASPE) serves construction estimators by providing education, fellowship and opportunity for professional development.

Association for Facilities Engineering (AFE) is the largest, dedicated network in the facility, maintenance and plant operations professions.

Energy Star Program is a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy that promotes energy efficient products and practices.

Heating, Air Conditioning & Refrigeration Distributors International (HARDI) is a not-for-profit trade organization dedicated to advancing the science of wholesale distribution in the HVACR industry.

Home Ventilating Institute (HVI), which represents a wide range of home ventilating products manufactured by companies in the United States, Canada, Asia, and Europe.

Independent Manufacturers Representatives (AIM/R) Trade association of independent sales representatives in the plumbing, heating, cooling and piping industry. Membership, newsletter and contact information.

National Air Duct Cleaners Association (NADCA)

NEMA National Electrical Manufacturers’ Association.

NATE North American Technician Excellence.

Plumbing-Heating-Cooling Contractors Association (PHCC) is an advocate for plumbing, heating and cooling contractors since 1883.

Radiant Panel Association (RPA) provides information on the world of radiant heating and cooling technology.

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.