DOE has issued pre-publication Federal Register notice determining that the updated model building energy codes, the 2021 International Energy Conservation Code (IECC) and ANSI/ASHRAE/IES Standard 90.1-2019, will increase energy efficiency in residential and commercial buildings, respectively.
DOE analysis estimates the following national average savings for buildings meeting the updated code (as compared to the previous respective edition).
Upon publication of this affirmative determination, each state must review and certify their state building codes relative to the updated editions of the IECC and Standard 90.1. Each notice provides further guidance on state code review processes and associated certifications.
The DOE supports the advancement of building energy codes. Modern building codes and standards offer cost-effective solutions, contributing to lower utility bills for homes and businesses, and helping to mitigate the impacts of climate change.