Residential Determinations - Previous

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.