Choosing a Residential Window

LBNL’s Windows and Daylighting Group provides technical support to government and industry efforts to help consumers and builders choose energy-efficient and cost-effective residential windows. The following are resources which provide practical information and advice.

The Efficient Windows Collaborative (EWC) web site, provides unbiased information on the benefits of energy efficient windows in houses throughout the United States, descriptions of how they work, and recommendations for proper use.
Selecting Windows for Energy Efficiency, an 1997  16 page brochure is available in PDF format (512K).