Green Building Library
Building Design

Model Energy Code

The Model Energy Code (MEC), published and maintained by the International Code Council (ICC) as the "International Energy Conservation Code" (IECC) as of 1998, contains energy efficiency criteria for new residential and commercial buildings and additions to existing buildings. Jurisdictions adopt the MEC or IECC as they revise and update their codes. The ICC has made changes to the MEC/IECC over the years that filter down to local areas. However, jurisdictions have different schedules for code updates. That leads to the current situation in which different areas enforce different versions of the MEC/IECC.

The U.S. Department of Energy provides Building Energy Codes Program (BECP) provides support for the Model Energy Code (MEC) and the International Energy Conservation Code (IECC) by developing compliance materials that simplify its use. The REScheck and COMcheck compliance materials, including energy analysis software, can be downloaded at no cost.

To order energy code materials over the telephone, call the Energy Codes hotline at 800-270-2633.