| ACCA |
Air Conditioning Contractors of America |
| ACCA-NCC |
Air Conditioning Contractors of America - National Capital Chapter |
| AFE |
Association for Facility Engineering |
| AGCC |
American Gas Cooling Center |
| AIA |
American Institute of Architects |
| ARI |
Air Conditioning and Refrigeration Institute |
| ASHRAE |
American Society of Heating, Refrigerating & Air Conditioning Engineers, Inc. |
| CIBSE |
Chartered Institution of Building Services Engineers |
| GRI |
Gas Research Institute |
| NSPE |
National Society of Professional Engineers |
| RSES |
Refrigeration Service Engineers Society |
| SMWIA |
Sheet Metal Workers International Association |
