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ASHRAE, ICC Seek Comments on Greenhouse Gas Emissions Evaluation Standard

April 21, 2023
The advisory public review is open through May 21.


The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)  and the International Code Council (ICC) announced that an advisory public review is open for a proposed joint greenhouse gas (GHG) evaluation standard.

Proposed ASHRAE/ICC Standard 240P, Evaluating Greenhouse Gas (GHG) and Carbon Emissions in Building Design, Construction and Operation is open for comment from April 21-May 21, 2023. Drafts are posted and comments can be made at

The purpose of Standard 240P is to provide a methodology to quantify and document GHG emissions associated with buildings, building systems and equipment over their life cycle.

The standard will cover the following:

  • Existing buildings, new buildings, groups of buildings or portions of buildings.
  • Determination, including calculation methodology, and expression of the building(s) zero net GHG and zero net carbon dioxide emissions status for building operation.
  • GHG emissions associated with flows across the site boundary and off-site credited flows.
  • Embodied GHG emissions of building materials and systems.

Standard 240P will also offer procedures and minimum requirements for the quantification of embodied and operational GHG emissions, including reporting and documenting.

A joint committee with a wide array of expertise and representation from ASHRAE and ICC was approved on Dec. 8, 2022, to develop the standard. Typically a 6- to 12-month process, the committee developed a draft of Standard 240P in four months.

“It is rare to have an advisory public review draft prepared for comment within essentially four months after the formation of a standards committee,” said 2022-23 ASHRAE President Farooq Mehboob, Fellow Life Member. “The accelerated pace in which a draft of Standard 240P was developed speaks to the extraordinary technical knowledge and leadership of the committee and its chairs. ASHRAE remains committed to advancing effective building decarbonization strategies and was pleased to partner with the Code Council to develop this much-needed resource.”

The committee is seeking comments on proposed revisions to the standard’s title, purpose and scope, as well as the remaining content being proposed in the document. Specific questions are included in the document for stakeholder input.

“The International Code Council is pleased to partner with ASHRAE in the development of Standard 240P and acknowledges the exceptional work of the standards committee in providing their time and expertise to this process,” said ICC CEO, Dominic Sims, CBO. “The Code Council is devoted to expanding on the tools needed to advance decarbonization across the industry and this public review draft highlights our ongoing commitment to this work.”

To review drafts of Standard 240P and provide comments, visit For all standards-related activities, including announcements, public review drafts open for comment, call for members and more, sign up for ASHRAE Standards Actions at

The full list of Standard 240P committee members is:

  • Stephanie Reiniche, chair, ASHRAE, Georgia (Nonvoting)
  • Beth Tomlinson, vice chair, Stantec, Minnesota (User)
  • Bradley Nies, vice chair, U.S. General Services Administration, Kansas (User)
  • Constantinos Balaras, NOA, Greece (General)
  • Jeff Bradley, American Wood Council, District of Columbia (Producer)
  • Stephanie Carlisle, Carbon Leadership Forum/University of Washington, Pennsylvania (General)
  • Drury Crawley, Bentley Systems, District of Columbia (General)
  • Michael P. Deru, National Renewable Energy Lab, Colorado (General)
  • Erik Elmtoft, AlfaTech Consulting Engineers, California (User)
  • Monica Enamorado, BASF, Texas (Producer)
  • Efrie Escott, KieranTimberlake, Pennsylvania (Producer)
  • Pieter James Gagnon, National Renewable Energy Lab, Colorado (Producer)
  • Carlos Augusto Garcia, Brooks & Scarpa, California (User)
  • Luca De Giovaneti, World Business Council for Sustainable Development, Switzerland (General)
  • David L. Handwork, UCE Partners/APPA, Arkansas (User)
  • Roger L. Hedrick, Noresco, Colorado (User)
  • Gary W. Heikkinen, Consultant to AGA, Oregon (Producer)
  • Ethan K. Heil, University of Virginia, Virginia (User)
  • Josh Jacobs, WAP Sustainability, Tennessee (Consultant)
  • Adam Jennings, AHA Consulting Engineers, Massachusetts (Producer)
  • Andrew Karlovich, Jones Lang LaSalle (JLL), New Jersey (General)
  • Chris Magwood, Rocky Mountain Institute, Canada (User)
  • Erin K. McConahey, ARUP, California (General)
  • Daniel M. Nall, Daniel Nall Consultant, New Jersey (User)
  • Lucile OCallaghan, Turner Engineering Group, New York (General)
  • Clare Parry, Development Victoria, Australia (User)
  • Julian Mark Parsley, BuroHappold Consulting Engineers, California (User)
  • Katie Poss, National Ready Mixed Concrete Association, Tennessee (Producer)
  • Max Puchtel, American Institute of Steel Construction, Illinois (Producer)
  • DeVaughn Roberts, Children’s Hospital of Pennsylvania, Pennsylvania (User)
  • Steven Rosenstock, Edison Electric Institute, District of Columbia (Producer)
  • Hendrikus Shank, New York Department of State, New York (User)
  • Zuojin Shi, Carrier, New York (Producer)
  • Christopher Uraine, Energy Solutions, Oregon (General)
  • Michael Waite, American Council for an Energy-Efficient Economy, New York (General)
  • Damian Watch, PGIM Real Estate, New Jersey (User)
  • Lauren Westmoreland, Stewards of Affordable Housing for the Future, District of Columbia (User)