What energy standards must Federal agencies follow for existing facilities?

§ 102–74.165 What energy standards must Federal agencies follow for existing facilities? Existing Federal facilities must meet the energy standards prescribed by the American Society of Heating, Refrigerating, and Air Conditioning Engineers and the Illuminating Engineering Society of North American in ASHRAE/IES Standard 90A–1980, as amended by the Department of Energy. Federal agencies must apply these energy standards where they can be achieved through life cycle, cost effective actions.