These standards have been and are the basis for our lighting quality and energy efficiency advocacy to the federal and state governments. Federal legislation references Standard 90.1 as the preferred standard for energy efficiency in commercial buildings. Many States have adopted some version of 90.1 as their official building energy efficiency standard.

ANSI/ASHRAE/IES Standard 90.1-2016
Energy Standard for Buildings Except Low-Rise Residential Buildings

ANSI/ASHRAE/IES Standard 100-2015
Energy Efficiency in Existing Buildings

ANSI/ASHRAE/USGBC/IES Standard 189.1-2014*
Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings

*Alternate Currently, an alternate compliance path to the 2015 International Green Construction Code (IgCC). Work is being finalized to incorporate Standard 189.1 into the International Code Council’s (ICC) 2018 IgCC.  Check with the IES, ASHRAE, ICC, or your local code officials for status.