Commercial Determinations

DOE Determinations in Progress

ANSI/ASHRAE/IESNA Standard 90.1-2007:   DOE is currently analyzing ANSI/ASHRAE/IESNA Standard 90.1-2007. Visit the ANSI/ASHRAE/IESNA Standard 90.1-2007 page for details.

Current DOE Determination

ANSI/ASHRAE/IESNA Standard 90.1-2004: On December 30, 2008, DOE issued the determination that Standard 90.1-2004 would achieve greater energy efficiency in buildings subject to the code, than the 1999 edition (Standard 90.1-1999 or the 1999 edition). The quantitative analysis of the energy consumption of buildings built to Standard 90.1-2004, as compared with buildings built to Standard 90.1-1999, indicates national source energy savings of approximately 13.9 percent of commercial building energy consumption. Visit the ANSI/ASHRAE/IESNA Standard 90.1-2004 page for details. View the complete determination notice that appeared in the Federal Register on December 30, 2008 (PDF 75 KB).

Previous DOE Determination

ANSI/ASHRAE/IESNA Standard 90.1-1999: On July 15, 2002, DOE issued a determination that Standard 90.1-1999 would improve commercial building energy efficiency by comparing it to Standard 90.1-1989. Visit the ANSI/ASHRAE/IESNA Standard 90.1-1999 page for details. View the news release announcing the determination, or the complete determination notice that appeared in the Federal Register on July 15, 2002 (PDF 151 KB).