In late April the U.S. Department of Housing and Urban Development (HUD) and U.S. Department of Agriculture (USDA) published final energy efficiency standards for new home construction. The new standards, mandatory for all HUD- and USDA-financed single-family construction housing, require that buildings meet the 2021 International Energy Conservation Code (IECC) and that HUD-financed multifamily housing be built to 2021 IECC or ASHRAE 90.1-2019.

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