A trade association representing manufacturers of air conditioning, heating and commercial refrigeration equipment.

Promotes the art, science and practice of mechanical and multidisciplinary engineering and allied sciences.

National organization serving wholesale-distributors and manufacturers of plumbing, heating, cooling and piping products and industrial pipe, valves and fittings.

A non-profit association of qualified, independent test and balance agencies.

The trade association representing manufacturers of air conditioning, heating and commercial refrigeration equipment.

To advocate and promote the use of environmentally responsible evaporative heat transfer systems, cooling towers, and cooling technology for the benefit of the public.

Represents a wide range of home ventilating products manufactured by companies in the United States, Canada, Asia, and Europe, producing the majority of the residential ventilation products sold in North America.

Works to foster the success of its members in providing reliable, economical, efficient and environmentally sound district energy services.

An international association serving those who use ammonia refrigeration technology.

Offering education programs, an expanding catalog of resources to help them manage and grow their businesses, periodicals and a website to keep them informed and connected.

An independent, third party organization that is a partnership between heating, ventilation, air-conditioning and refrigeration educators and the HVACR industry that will award accreditation to programs that have met and/or exceeded industry validated standards.

Dedicated to the promotion, advancement, education and training of the industry.