| Professional Associations |
| Air Conditioning Contractors of America (ACCA) : National association of HVACR installation and service contractors with an emphasis on indoor air comfort. |
| Air Movement and Control Association (AMCA) : International association of HVACR engineers in the air movement and control industry. |
| American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) : International association of HVACR engineers. |
| American Society of Mechanical Engineers (ASME) : International association of engineers promoting multidisciplinary engineering. |
| International Association of Ammonia Refrigeration (IIAR) : International association of HVACR engineers promoting the use of natural refrigerants. |
| Refrigerating Engineers and Technicians Association (RETA) : International association of HVACR companies and individuals involved with industrial refrigeration. |
| Refrigeration Service Engineers Society (RSES) : National association of HVACR installation and service contractors with an emphasis on refrigeration. |
| Trade Associations |
| Air-Conditioning, Heating, and Refrigeration Institute (AHRI) : North American association of HVACR equipment manufacturers. |
| Commercial Food Equipment Service Association (CFESA) : International association of foodservice equipment technicians and service organizations. |
| Food Marketing Institute (FMI) : National association of food retailers and wholesalers. |
| Heating, Airconditioning & Refrigeration Distributors International (HARDI) : North American association of HVACR wholesalers. |
| Heating, Refrigeration and Air Conditioning Institute of Canada (HRAI) : Canadian association of HVACR manufacturers, wholesalers and contractors. |
| Mechanical Contractors Association of America (MCAA) : National association of HVACR, plumbing, piping and mechanical service firms. |
| North American Association of Food Equipment Manufacturers (NAFEM) : North American association of foodservice equipment manufacturers. |
| Plumbing-Heating-Cooling Contractors Association (PHCC) : National association of plumbing and HVACR contractors. |
| Radiant Professionals Alliance (RPA) : International association promoting the use of radiant heating and cooling technologies. |
| Sheet Metal and Air Conditioning Contractors' National Association (SMACNA) : International association of sheet metal and air conditioning contractors. |
| Testing Organizations |
| HVAC Excellence : Develops, administers and provides training for certification exams for HVACR technicians. |
| North American Technician Excellence (NATE) : Develops and administers certification exams for HVACR technicians. |
| Resources/Training |
| HVAC School : Resource for HVACR technicians and for those interested in the trade. |
| Refrigeration Mentor : Training website for HVACR technicians with a focus on refrigeration. |