Commercial Standard 90.1 Cost-Effectiveness Analysis and Results

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).

National Analysis:

State Analyses:

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.

Table 1. Cost Effectiveness Analysis by State*
Alabama Alaska* Arizona* Arkansas
California* Colorado Connecticut Delaware
District of Columbia Florida* Georgia Hawaii*
Idaho* Illinois* Indiana* Iowa
Kansas* Kentucky Louisiana* Maine*
Maryland* Massachusetts Michigan* Minnesota*
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.