Our Trusted HVACR Industry Organizations
Air Conditioning Contractors of America (A.C.C.A.) is a non-profit organization with over 64,000 members in the indoor environment and energy services community.
Air Conditioning Heating & Refrigeration Institute Directory of Product Performance is a directory of air conditioning, heating, and refrigeration equipment.
Database of State Incentives for Renewables and Efficiency–Illinois is a state-specific database of incentives for use of environmentally-friendly equipment.
Database of State Incentives for Renewables and Efficiency–Missouri is a state-specific database of incentives for use of environmentally-friendly equipment.
Energy Policies and Tax Credit Information (EnergyStar) is an extensive library of information regarding available federal income tax credits for energy efficiency.
Gateway Air Conditioning Contractors is a contractor-led organization that provides training classes and updates on key industry issues.
Heating, Air Conditioning & Refrigeration Distributors International (HARDI) is an organization representing hundreds of HVACR distributors.
Mechanical Contractors Association (M.C.A.) is an association providing approximately 2,500 HVACR, plumbing, piping, and mechanical service businesses with educational materials and programs.
Refrigeration Service Engineers Society (R.S.E.S.) is a leader in education and training for HVACR technicians and contractors.
Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA) is an international trade association in the sheet metal and air conditioning industries representing nearly 2,000 firms in four countries.
St. Louis County Public Works – Licensing & PEU Information is information regarding electrical, mechanical, and plumbing licensing in St. Louis county, as well as backflow testing and code review committees.