A wider airspace between glass panes appears to boost the efficiency of windows in Europe, so why hasn't the U.S. followed suit? More
Spot-specing windows based on their orientation--rather than installing a houseful of the same model--can have a significant impact on efficiency and homeowner comfort. More
Spot-specing windows based on their orientation--rather than installing a houseful of the same model--can have a significant impact on efficiency and homeowner comfort. More
The pilot program, which awards product energy performance ratings for commercial projects, was officially implemented in January More
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