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International Energy Conservation Code 2021 (IECC 2021)

States adopting the IECC 2021With AmendmentsWithout Amendments

International Energy Conservation Code 2021 (IECC 2021)

The International Energy Conservation Code 2021 (IECC 2021) is a 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, Connecticut, Chicago, Maine, Montana, New Jersey, and Austin.

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