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  • windows, doors, fenestration
  • $25 billion a year in US: energy



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  • Standards for windows by CAN, CGSB, CSA, ASTM, AAMA
  • computer code: Windows (not Microsoft)



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    		Essay:

    Energy loss through windows

    Energy lost through residential and commercial windows costs U.S. consumers about $25 billion a year, a loss comparable to the value of the oil delivered by the Alaska pipeline. LBNL pioneered the commercialization of "low-emissivity" windows and labeling systems, which reduce the energy lost through normal, double-glazed windows by 35%. Thanks to LBNL's close collaboration with window manufacturers, and a DOE investment of $3 million, the market share for these advanced windows has reached about 35% (with an annual market value of $630 million). Cumulative U.S. energy savings to date from these windows is $760 million and will reach $17 billion--net of added up-front costs--by 2015. (Source: http://eetd.lbl.gov/EA/mills/Lab2Mkt/Windows.html)



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