Energy Conservation Code 2021 (IECC 2021)


States adopting the IECC 2021 With Amendments Without Amendments

Energy Conservation Code 2021 (IECC 2021)

The Energy Conservation Code 2021 (IECC 2021) is a model code produced by the International Code Council (ICC). This document provides the foundation for many state and city codes. The IECC 2021 combined with local jurisdiction amendments form the state codes. Adopting jurisdictions include Colorado, and Maine.

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