ASHRAE has released an expanded, revised version of a well-known energy standard.

ANSI/ASHRAE/IES Standard 90.1-2019, Energy Efficiency Standard for Buildings Except Low-Rise Residential Buildings, contains more than 100 changes from the 2016 version, including numerous energy-saving measures.

Standard 90.1 has been a benchmark for the commercial building energy codes in the United States and a key basis for codes and standards around the world. The 2019 version is the 11th edition published since the original standard was first published in 1975 during the U.S. energy crisis.