Glazing and façade systems have very large impacts on all aspects of commercial building performance. They directly influence peak heating and cooling loads, and indirectly influence lighting loads when daylighting is considered. In addition to being a major determinant of annual energy use, they can have significant impacts on peak cooling system sizing, electric load shape, and peak electric demand. Because they are prominent architectural and design elements and because they influence occupant preference, satisfaction and comfort, the design optimization challenge is more complex than with many other building systems.

Façade designs that are cognizant of the fundamental synergistic relationships between the façade and lighting and mechanical systems have the potential to deliver high performance over the life of the building. These "integrated" façade systems represent a key opportunity for commercial buildings to significantly reduce energy and demand, helping to helping moveing us toward our goal of net zero energy buildings by 2030.

This website provides technical information, measured data, case study information, simulation tools, and market-related information that will enable architects and engineers to better design and build low-energy commercial building façades. The website content is a result of an on-going collaborative research and development (R&D) project, supported by the U.S. Department of Energy and the California Energy Commission Public Interest Energy Research (PIER). Website content will be updated as new work is completed.