The American Society of Heating, Refrigerating and Air-Conditioning Engineers advances technology to serve humanity and promote a sustainable world.

ACCA is a group of over 4,000 air conditioning contractors who work together to improve our industry, promote good practices, and keep homes and buildings safe, clean and comfortable.

Plumbing-Heating-Cooling Contractors Association - Dedicated to the promotion, advancement, education and training of the industry, for the protection of our environment and the health, safety, and comfort of society.

IFMA is the world’s largest and most widely recognized international association for professional facility managers, supporting more than 19,000 members in 60 countries. The association’s members, represented in 125 chapters and 15 councils worldwide, manage more than 37 billion square feet of property and annually purchase more than $100 billion in products and services.

BOMA International is a primary source of information on office building development, leasing, building operating costs, energy consumption patterns, local and national building codes, legislation, occupancy statistics and technological developments.