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 and to view the Draft Methodology for a Comparative Analysis of ANSI/ASHRAE/ IESNA Standard 90.1-2007 and Standard 90.1-2004. DOE will be using this new methodology for the analysis and will hold a public meeting on February 18, 2009, 9:00 a.m. to 2:00 p.m. to allow for public comment. View the public meeting notice that appeared in the Federal Register on January 23, 2009 (PDF 61 KB).

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).

The Process

View the Determinations Background page for more information on the determination process.

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