On June 11, the Department of Energy announced findings on energy savings from adopting and complying with the 2015 International Energy Conservation Code (IECC). Compared with residential buildings meeting the 2012 IECC, the 2015 edition achieves national source energy savings of approximately 0.87 percent, site energy savings of approximately 0.98 percent, and energy cost savings of 0.73 percent of residential building energy consumption. With the final determination established, each state is now required by statue to certify that it has reviewed DOE’s analysis on the residential building code provisions regarding energy efficiency and to make a determination as to whether to update its code to meet or exceed the 2015 IECC. Certification statements for the 2015 IECC must be submitted to the Building Technologies Office by June 12, 2017.