An Energy Efficiency Measure is an action or set of actions implemented in a building’s operation or equipment that reduces energy consumption without negatively impacting the building’s environment or performance.
ANSI/ASHRAE Standard 100-2018 is another reference along with this link: https://www.ashrae.org/file%20library/technical%20resources/standards%20and%20guidelines/standards%20addenda/100_2018_k_20231130.pdf?utm_source=chatgpt.com