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Browsing Green Builders - Energy Saving Homes » High efficiency Windows and doors

High efficiency Windows and doors 

Windows, doors, and skylights (also known as "fenestration") contribute significantly to the whole building design approach to energy efficiency, which is a key strategy in meeting the Building Technologies Program's zero energy goals.

Conventional windows are the weak links in the building envelope. They consume approximately 3.8 quadrillion Btu of energy in the U.S. annually in the form of heating and air conditioning loads, at a cost of more than $30 billion. Yet ultimately, window systems have the potential to outperform the best-insulated wall or roof in terms of annual energy performance, peak demand reduction, and costs—for any orientation or climate.

The long-term energy target of the Building Technologies Program's windows and doors R&D is to save over 4 quadrillion Btu of energy annually in U.S. buildings, by reducing heating, cooling, and lighting loads. This savings is the equivalent of 2 million barrels of oil per day. Achieving the long-term target requires aggressive R&D efforts, coupled with voluntary and mandatory deployment efforts at national, regional, and local levels.

The Building Technologies Program windows and doors R&D focuses on two areas:

  • Technology Development—for the next generation of fenestration products, across all climates and building types
  • Design Tools and Technology Support—providing the tools and knowledge to develop advanced products

Potential cost and energy savings are substantial. DOE-sponsored research has yielded major contributions to improving window energy efficiency over the past two decades. Advances in one area alone—low-e coatings for windows—are estimated to have saved the United States more than $8 billion.





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