Organizations

ASHRAE – American Society of Heating, Refrigerating, and Air-Conditioning Engineers

AHRI - Air Conditioning and Refrigeration Institute

ACCA – Air Conditioning Contractors of America

GHPC – Geothermal Heat Pump Consortium Environmental Resources

EPA – The Environmental Protection Agency

ISO – International Organization for Standardization
ANSI – American National Standards Institute Government Resources

EREN-DOE – Energy Efficiency and Renewable Energy Network, U.S. Dept. of Energy
U.S. Patent  Classes – Engineering Group

ESnet – The Energy Sciences Network