The U.S. Department of Energy (DOE) supports the development of cost-effective energy codes and standards to increase efficiency in residential and commercial buildings. Pacific Northwest National Laboratory (PNNL) conducted a series of cost analyses for ANSI/ASHRAE/IES Standard 90.1: Energy Standard for Buildings Except Low-Rise Residential Buildings — the commercial model energy code. The cost analyses compare Standard 90.1-2010 to the prior 2007 edition, based on six prototype buildings in five representative U.S. climate zones. PNNL also conducted energy savings analysis for Standard 90.1-2010 and the commercial requirements of the International Energy Conservation Code (IECC).
- Cost Analysis of Standard 90.1-2010 compared to 90.1-2007 
- Energy Savings Analysis of Standard 90.1-2010 compared to 90.1-2007 and 90.1-2004 
- Energy Savings Analysis of the 2012 IECC compared to the 2009 and 2006 IECC 
Cost reports covering state-specific climate and cost scenarios are available in Table 1.
DOE assesses the cost-effectiveness of commercial codes and standards based on a life-cycle approach, balancing first costs against longer-term energy savings over the life of the building. More information on the DOE methodology for evaluating the energy and economic performance of commercial building energy codes is available on the Commercial Energy and Cost Analysis Methodology  page.
For questions not covered in the report, or other concerns, please contact the Building Energy Codes Program help desk .
|Alabama ||Alaska*||Arizona*||Arkansas |
|California*||Colorado ||Connecticut ||Delaware |
|District of Columbia ||Florida*||Georgia ||Hawaii*|
|Mississippi*||Missouri*||Montana ||Nebraska |
|Nevada*||New Hampshire*||New Jersey ||New Mexico|
|New York ||North Carolina ||North Dakota*||Ohio*|
|Oklahoma ||Oregon*||Pennsylvania*||Rhode Island |
|South Carolina ||South Dakota*||Tennessee*||Texas |
|Utah ||Vermont*||Virginia ||Washington*|
|West Virginia*||Wisconsin ||Wyoming*|
|*Cost Analysis not planned for this state.|