In the U.S., building energy codes are the jurisdiction of each state, and while some have developed their own codes, the federal government requires a minimum standard—ANSI/ASHRAE/IESNA Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings. Currently a joint effort of ASHRAE and IESNA (Illuminating Engineering Society of North America), an updated version of this standard was published in October 2013. Revisions feature a host of HVAC and building envelope requirements as well as changes to lighting requirements aimed at increasing energy efficiency of commercial buildings while maintaining quality light for occupants.
“While many things have changed since the first version of Standard 90 was published in 1975, the need to reduce building energy use and cost has not,” commented Steve Skalko, chair of the committee that wrote the 2013 standard. “This standard represents many advances over the 2010 standard, as we worked toward our goal of making [it] 40% to 50% more stringent than the 2004 standard.”