ASHRAE and ICC Launch Second Public Review for Standard 240P on Life‑Cycle Emissions
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The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) and the International Code Council have announced a second public review period for the proposed Standard 240P – Quantification of Life Cycle Greenhouse Gas Emissions of Buildings. The draft is open for comment from June 6 to July 21, 2025, and can be accessed via ASHRAE’s online public review portal.
This draft standard offers a unified methodology to measure and document both embodied and operational GHG emissions across the full life cycle of buildings and their sites. Key updates from the previous version include clarified definitions, an expanded system boundary for life-cycle stages, a shift from GWP‑20 to GWP‑100 for global warming potential, and more detailed guidance on embodied emissions.
ASHRAE President M. Dennis Knight emphasized that “Standard 240P is intended to bring clarity and consistency to how we evaluate embodied emissions throughout the building process”. Ryan Colker of ICC added that this collaboration “empowers…industry and related sectors to work from a common platform to measure and report GHG emissions transparently.”
The standard targets professionals, government agencies, and financial institutions seeking consistent, transparent reporting tools to support climate‑resilient construction and operations. Stakeholders are urged to review and comment before the July 21 deadline.
Source: ashrae.org
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