Building Energy Codes - Ashrae V. IECC

This fact sheet provides a starting point and quick reference tool for retailers on the two major energy code models in the U.S. The included summary table provides a comparison between the new commissioning requirements in accordance with ASHRAE/ IES Standard 202 (Commissioning Process for Buildings/Systems) and the IECC 2021 requirements, broken down into categories including building envelope, mechanical, lighting, and other items.