Commercial Determinations
ANSI/ASHRAE/IES Standard 90.1-2019
On July 28, 2021, DOE issued a determination that Standard 90.1-2019 would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A technical analysis was performed in support of the Standard 90.1-2016 Determination.
ANSI/ASHRAE/IES Standard 90.1-2016
On February 27, 2018, DOE issued a determination that Standard 90.1-2016 would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A technical analysis was performed in support of the Standard 90.1-2016 Determination.
ANSI/ASHRAE/IES Standard 90.1-2013
On September 26, 2014, DOE issued a determination that Standard 90.1-2013 would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A qualitative analysis and quantitative analysis was performed in support of the Standard 90.1-2013 Determination.
ANSI/ASHRAE/IES Standard 90.1-2010
On October 19, 2011, DOE issued a determination that Standard 90.1-2010 would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A qualitative analysis and quantitative analysis was performed in support of the Standard 90.1-2010 Determination.
ANSI/ASHRAE/IESNA Standard 90.1-2007
On July 20, 2011, DOE issued a determination that Standard 90.1-2007 would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A qualitative analysis and quantitative analysis was performed in support of the Standard 90.1-2007 Determination.
ANSI/ASHRAE/IESNA Standard 90.1-2004
On December 30, 2008, DOE issued a determination that Standard 90.1-2004 would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A qualitative analysis and quantitative analysis was performed in support of the Standard 90.1-2004 Determination.
ANSI/ASHRAE/IESNA Standard 90.1-1999
On July 15, 2002, DOE issued a determination that Standard 90.1-1999 would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A qualitative analysis and quantitative analysis was performed in support of the Standard 90.1-1999 Determination.
Residential Determinations
2018 IECC
On December 10, 2019, DOE issued a determination that the 2018 IECC would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A technical analysis was performed in support of the 2018 IECC Determination.
2015 IECC
On June 11, 2015, DOE issued a determination that the 2015 IECC would achieve greater energy efficiency in buildings subject to the code.
Supporting Analysis
A technical analysis was performed in support of the 2015 IECC Determination.
2012 IECC
On May 17, 2012, DOE issued a determination that the 2012 IECC would achieve greater energy efficiency in residential buildings subject to the code.
2009 IECC
On July 19, 2011, DOE issued a determination that the 2009 IECC would achieve greater energy efficiency in residential buildings subject to the code.
2006 IECC
On July 19, 2011, DOE issued a determination that the 2006 IECC would achieve greater energy efficiency in residential buildings subject to the code.