![]() Let’s take a look at what’s new, focusing on salient changes while noting this information is provided for educational purposes only and does not constitute a definitive interpretation, which is up to the authority having jurisdiction. The 2022 version of 90.1 is no exception, with changes focused on tightening interior power allowances-based almost entirely on LED technology-while tweaking requirements for lighting controls. Since 1999, the overall trend is toward lower power allowances and more detailed control requirements to maximize energy savings. Both model codes are updated every three years.įor lighting, typically, energy codes impose a mix of prescriptive and mandatory requirements, with mandatory requirements focused on lighting controls. Further, the IECC recognizes 90.1 as an alternative compliance standard. Department of Energy as the national reference code (currently the 2019 version, with all states required to adopt a code at least stringent as this version by July 2023) it is also the basis for building rating systems such as LEED. ![]() While a majority of codes are based on the IECC, 90.1 is recognized by the U.S. A majority of states rely on model energy codes such as ASHRAE/ANSI/IES 90.1 and the International Energy Conservation Code (IECC). ![]() Commercial building energy codes regulate the designed energy efficiency of nonresidential buildings.
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