Energy Star window standard

A standard for window performance established by the U.S. Department of Energy (DOE). Energy Star window criteria are climate-zone dependent; the DOE divides the country into four climate zones. In the northern zone, the U-factor of an Energy Star window must be no higher than 0.35. Energy Star windows sold in the southern zone must have a maximum U-factor of 0.75 and a maximum solar heat gain coefficient (SHGC) of 0.40. The criteria for the two central zones fall within the ranges established by the coldest and warmest zones.

单词	energy star window standard
释义	Energy Star window standard Energy Star window standard A standard for window performance established by the U.S. Department of Energy (DOE). Energy Star window criteria are climate-zone dependent; the DOE divides the country into four climate zones. In the northern zone, the U-factor of an Energy Star window must be no higher than 0.35. Energy Star windows sold in the southern zone must have a maximum U-factor of 0.75 and a maximum solar heat gain coefficient (SHGC) of 0.40. The criteria for the two central zones fall within the ranges established by the coldest and warmest zones.
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