Energie/Wärme:

www.energycodes.gov  -  U. S. Department of Building Energy Codes
www.glass.org  -  National Glass Association
www.nwwda.org  -  Window and Door Manufacturers Association
www.acca.org  -  Airconditioning Contractors of America
www.enviro-engrs.org  -  American Association of Environment Engineers

www.acec.org  -  American Consulting Engineers Council
www.ashrae.org  -  American Society of Heating, Refrigerating and Air-Conditioning Engineers
www.eeba.org  -  Energy Efficient Building Association
www.naiop.org  -  National Association of Industrial and Office Properties