Standard 90.1-2007 Established as National Reference Standard for Federal, Commercial Buildings

Commercial and high-rise residential and federal buildings must now meet requirements in ASHRAE/IESNA’s 2007 energy efficiency standard, under recent rulings issued by the United States Department of Energy (DOE) that finds the standard saves more energy than the 2004 version.

More…

[source: http://www.buildings.com/Article-Details/ArticleID/12775/title/standard-9012007-established-as-national-reference-standard-for-federal-commercial-buildings.aspx]