Air Conditioning Contractors of America: www.acca.org
Air-Conditioning, Heating , and Refrigeration Institute
The American Society of Heating, Refrigerating and Air-Conditioning Engineers
Energy Star
Environmental Protection Agency
HARDI
National Comfort Institute
NORTH AMERICAN TECHNICIAN EXCELLENCE
Plumbing-Heating-Cooling Contractors Association
The Plumbing and Mechanical Professionals of Virginia
RSES