U.S. Department of Energy Sites

Energy Efficiency and Renewable Energy
www.eere.energy.gov/
The Energy Efficiency and Renewable Energy Clearinghouse offers a variety of information including Home Energy magazine.

Energy Codes
www.energycodes.gov
Information on national model energy codes. Source for REScheck residential code compliance software and COMcheck-EZ commercial code compliance software.

ENERGY STAR
www.energystar.gov
Government-backed program that sets standards for energy efficiency.

Industry Associations

ASHRAE
www.ashrae.org
American Society of Heating, Refrigerating, and Air Conditioning Engineers.

Efficient Windows Collaborative
www.efficientwindows.org
Information on the benefits of energy-efficient window and on choosing the right window.

Energy Efficient Building Association
www.eeba.org

Institute of Electrical and Electronics Engineers
www.ieee.org
A non-profit, technical professional association.

NAHB Research Center
www.nahbrc.org
Research from the National Association of Home Builders.

RESNET
www.natresnet.org
National Association of State Energy Officials and Energy Rated Homes of America founded the Residential Energy Services Network (RESNET) to develop a national market for home energy rating systems and energy efficient mortgages.  

Other Resources

Energy Design
www.energydesignresources.com
Offers energy design tools and resources for designing and building energy-efficient buildings.

Housing Zone
www.housingzone.com
Business information for home builders, remodelers, architects, cost estimators, building products.