National Energy and Cost Savings for New Single- and Multifamily Homes: A Comparison of the 2006, 2009, and 2012 Editions of the IECC

The 2009 and 2012 International Energy Conservation Code (IECC) yield positive benefits for U.S. homeowners and significant energy savings for the nation. Moving from a baseline of the 2006 IECC to the 2009 IECC reduces average annual energy costs by 10.8%, while moving from the same baseline to the 2012 IECC reduces them by 32.1%. These reductions amount to annual energy cost savings of $168 and $497, respectively. The 2012 IECC saves $329 in energy costs compared to the 2009 IECC.