For the Public Good

For more than 50 years the Windows and Envelope Group in the Energy Technologies Area at Berkeley Lab has been serving Industry, the public and Policymakers with informed research. Our work has inspired efficiency in the built environment and improved the environment for residents of homes and buildings. We've enabled the savings of billions of dollars worldwide, thanks to our research.

For the Public Good

Changing the World

Building windows
Berkeley Lab partnered with industry
to develop Low-E windows

Low-E windows – featuring an energy-saving technology developed through Berkeley Lab research – are now found in 80% of homes and 50% of buildings in the United States.

Window innovations we developed in collaboration with industry are cutting energy cost for American families, businesses, institutions, and governments every year. With funding from the Energy Department, Berkeley Lab has developed technologies that help prevent energy from escaping out of windows.

Lab researchers pioneered new energy-efficient windows, design tools, and window-rating systems, and then worked closely with window manufacturers and the building industry to achieve a greater than 80% market share of windows incorporating Low-emissive (Low-E) coatings in the residential sector, and more than 50% in the commercial sector.

Technology Platform

Low-E coatings have evolved into a “technology platform” on which new generations of innovative window designs are being based. Berkeley Lab continues to create innovative window technologies with practical applications in collaboration with industry.

Berkeley Lab researchers developed early design concepts and prototypes for "superwindows"— triple-paned windows with two low-E coatings and krypton gas fill—that actually insulate better than a wall. Lab researchers also have worked on highly-insulating aerogel windows and vacuum windows, both of which are still in the research and development phases. With Berkeley Lab leading the way, the efficient window of the future will be part of smart building systems, dynamically managing sunlight, view, and glare.