The Public Comment Draft #1 of the 2024 International Energy Conservation Code Commercial Provisions was released on September 6, 2022. With buildings currently representing 39% of U.S. carbon emissions, leading jurisdictions recognize the importance of using building codes and performance policies to respond to the effects of climate change and reduce future risks. To keep temperature rise below 1.5 degrees Celsius, new construction in the U.S. must be all-electric by 2025, and climate-optimized by 2030. With just one code development cycle before 2025, and only three to reach 2030, the provisions adopted into the 2024 International Energy Conservation Code (IECC) are critical to achieve the model code needed to mitigate buildings’ contributions to climate change.
From 2006 to 2021, the IECC increased its efficiency requirements by about 40%, or an average of 8% a cycle. The 2024 IECC continues to reduce the energy use of buildings with efficiency and for the first time includes onsite renewable energy and grid integration requirements. The lighting provisions of the draft 2024 IECC model energy code are located on pages 266 to 291, of the draft model commercial building code, which can be downloaded here.