Association of Consulting Engineers (ACE)
http://www.acenet.co.uk/

American Council of Engineering Companies (ACEC)
http://www.acec.org/

Association of Energy Engineers (AEE)
http://www.aeecenter.org/

American Indoor Air Quality Council (AIAQC)
http://www.indoor-air-quality.org/


Air Movement and Control Association (AMCA)
http://www.amca.org/

American Society of Heating Refrigeration and Air Conditioning Engineers (ASHRAE)
http://www.ashrae.org/

International Air-Conditioning Heating Refrigerating Exposition (AHR Expo)
http://www.ahrexpo.com

American Society of Mechanical Engineers (ASME)
http://www.asme.org/

American Society of Safety Engineers (ASSE)
http://www.asse.org/

Building Commissioning Association (BCA)
http://www.bcxa.org/

Building Owners and Managers Association (BOMA)
http://www.boma.org

Construction Specifications Institute (CSI)
http://www.csinet.org

Indoor Air Quality Association (IAQA)
http://www.iaqa.org

Institute of Environmental Sciences and Technology (IEST)
http://www.iest.org

International Facility Managers Association (IFMA)
http://www.ifma.org

International Kitchen Exhaust Cleaning Association (IKECA)
http://www.ikeca.org

National Air Duct Cleaners Association (NADCA)
http://www.nadca.com

National Society of Professional Engineers (NSPE)
http://www.nspe.org

U.S. Green Building Council (USGBC)
http://www.usgbc.org

Goverment Organizations:

Department of Energy (DOE)
http://www.doe.gov

Environmental Protection Agency (EPA)
http://www.epa.gov

National Institute of Standards and Technology (NIST)
http://www.nist.gov

National Institute of Occupational Safety & Health (NIOSH)
http://www.cdc.gov/niosh/homepage.html