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.
In an announcement in the Sept. 26, 2014 edition of The Federal Register, DOE attributes the greater energy savings to improvements in ANSI/ASHRAE/IES Standard 90.1-2013, Energy Standard for Buildings Except Low-Rise Residential Buildings, related to several areas, including better lighting, fans, commercial refrigeration, boilers.
The determination means that states are required to update their codes to meet or exceed the 2013 standard within two years. Currently, states must meet or exceed the 2010 standard, which serves as the commercial building reference standard for state building energy codes under the federal Energy Conservation and Production Act.
Among the eight addenda that are identified as having a major positive impact on energy efficiency, IES notes that three are attributed to lighting changes according to Rita Harrold, IES director of technology. These address control requirements for lighting alterations, additional controls for more spaces with a shortened time to lighting reduction or shutoff, and a decrease in lighting power density in most building types to reflect changes in revisions to illuminance recommendations in the IES Lighting Handbook, 10th edition.
Click here to learn more about the lighting changes in ASHRAE/IES 90.1-2013.