DOE Updates National Reference Standard for Commercial Buildings to 90.1-2013

Following preliminary analysis that ASHRAE/IES’s 2013 energy efficiency standard contains energy savings over the 2010 standard – 8.5% source energy savings and 7.6% site energy savings – the U.S. Department of Energy (DOE) has issued a ruling that establishes the 2013 standard as the commercial building reference standard for state building energy codes. The determination means that states are required to update their codes to meet or exceed the 2013 standard within two years.

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