American Society of Heating, Refrigerating, and Air-Conditioning Engineers http://www.ashrae.org/

American Solar Energy Society http://www.ases.org/

Boulder Green Building Guild http://www.bgbg.org

Center for Resource Conservation http://www.conservationcenter.org

City of Boulder’s Climate Action Plan www.beclimatesmart.com

City of Boulder, Historic Building Energy Efficiency Guide

http://www.bouldercolorado.gov/index.php?option=com_content&task=view&id=8217&Itemid=22

City of Boulder’s Office of Environmental Affairs www.environmentalaffairs.com

Energy & Environmental Building Association http://www.eeba.org/

EPA’s Energy Star http://www.energystar.gov

E-Star Colorado http://www.e-star.com/

Historic Boulder http://www.historicboulder.org

Metro Denver HBA’s Built Green Colorado http://www.builtgreen.org

Natural Home Magazine http://www.naturalhomemagazine.com/

Residential Energy Services Network (RESNET) http://www.natresnet.org

USGBC’s  LEED-H http://www.usgbc.org