Energy Code Update Proposal Passes with 123 of 163 Recommendations Adopted

The Building Code Council's recent meeting on July 25, 2025, marked a significant step forward in energy efficiency regulations, with the approval of 123 out of 163 proposals aimed at enhancing building performance standards. This initiative is part of a broader effort to achieve a 70% reduction in energy use by 2031, compared to the 2006 energy code baseline.

The council's discussions highlighted the collaborative efforts of technical advisory groups, which dedicated over 85 hours to refine proposals, reflecting a strong commitment to consensus-building. Notably, the council streamlined the energy code by merging fossil fuel and non-fossil fuel pathways into a single prescriptive pathway, simplifying compliance for builders and developers.

Among the key updates, the council introduced a requirement for a minimum of 20% triple glazing in many buildings, a decision backed by cost analysis indicating the feasibility of newer, lighter triple glazing technologies. This change aims to improve insulation and reduce energy consumption in buildings.

The council also addressed mechanical system efficiencies, particularly in existing buildings, by allowing air conditioning units to serve dual purposes as heat pumps. This approach is expected to enhance energy efficiency during system replacements.

While most proposals passed with overwhelming support, three faced closer scrutiny, reflecting ongoing debates within the council. The council is now preparing to issue a public comment period for these proposals, inviting community feedback on the proposed changes.

Looking ahead, the council anticipates that the updates will yield a 10% improvement in energy efficiency over the previous code cycle, with further modeling from the Pacific Northwest National Labs (PNNL) expected to provide clarity on the overall impact of these changes. The transparency of this modeling process will be crucial as the council moves forward in its commitment to sustainable building practices.