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). For lighting, the new version adjusts interior power allowances, updates several control requirements, and introduces a simplified compliance method for office, school, and retail buildings.Ĭommercial building energy codes regulate the designed energy efficiency of nonresidential buildings. This edition includes more than 100 changes from the 2016 version, covering administrative and enforcement, commissioning, mechanical, and lighting. ![]() The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) and the Illuminating Engineering Society (IES) recently published ANSI/ASHRAE/IES Standard 90.1-2019, Energy Efficiency Standard for Buildings Except Low-Rise Residential Buildings.
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