The National Fenestration Rating Council (NFRC) The nation's recognized organization for measuring and evaluating window energy performance. For more information about NFRC, visit them at www.nfrc.org.

The Northwest Energy Efficiency Alliance (www.nwalliance.org) is a nonprofit group of electric utilities, state governments, public interest groups, and industry representatives committed to bringing affordable energy efficient products and services to the marketplace.

Part of the Alliance to Save Energy, the Efficient Windows Collaborative works with the window industry and the Department of Energy's laboratories. For more information about the Efficient Windows Collaborative, visit them at www.efficientwindows.org.

Visit the ENERGY STAR^® Web site at www.energystar.gov.

Following is a list of useful Web sites focusing on energy efficient windows:

Lawrence Berkeley National Laboratory - http://windows.lbl.gov

National Renewable Energy Laboratory Center for Buildings and Thermal Energy Systems - www.nrel.gov

American Architectural Manufacturers Association - www.aamanet.org

U.S. Department of Energy's Energy Efficiency and Renewable Energy Network - www.eren.doe.gov/erec/factsheets/eewindows.html

Information on the flat glass industry - www.glass.org

If you are interested in the Northwest's energy and other energy efficiency organizations, visit the following sites. They represent the region's interests relating to energy policy and direct many of the efficiency programs providing new ways to save energy and money for businesses and homeowners.

Bonneville Power Administration (BPA) - www.bpa.gov.

Better Bricks - www.betterbricks.com.

Energy Ideas Clearinghouse - www.energyideas.org.

Idaho State Energy Office - www.idwr.state.id.us/energy/.

Montana State Energy Office - www.dnrc.state.mt.us.

Oregon State Energy Office - www.energy.state.or.us.

Washington State Energy Office - www.energy.wsu.edu.