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ASHRAE and ICC Release 2018 IgCC User’s Manual

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  • 30 Mar 2021
  • Resources
  • Atlanta, GA

ASHRAE and ICC Release 2018 IgCC User’s Manual

Karen Buckley Washington
Public Relations Specialist

ATLANTA (March 30, 2021) – ASHRAE and the International Code Council (ICC) have announced the release of the 2018 International Green Construction Code® (IgCC®) User’s Manual. The User’s Manual is a joint initiative of the ICC and ASHRAE.

The User’s Manual was developed to provide an understanding of the principles on which the IgCC is based, including the requirements of the code, and how those requirements may be met. The publication contains sample calculations, forms to demonstrate compliance, and references to helpful resources and websites.

“ASHRAE remains committed to providing sustainability strategies to improve indoor air quality and building performance,” said 2020-21 ASHRAE President Charles E. Gulledge III, P.E. “The IgCC User’s Manual offers a clear roadmap to the specific requirements of the 2018 IgCC with provisions that promote sustainable construction in an integrated fashion.”

“As the demand for green building design, construction and operational techniques continues to grow, the IgCC remains one of the many strong solutions that help communities establish sustainable, resilient, high-performance buildings,” said Code Council Executive Vice President Mark Johnson. “The new IgCC User’s Manual provides resources that aid the career development of building safety professionals, which is key to our efforts to welcome the next generation of industry leaders and lead the way to sustainable and resilient building.”

The user’s manual is intended to support building professionals, including architects, engineers, contractors and other building professionals applying the 2018 IgCC and is also suitable for use in educational programs. The publication offers a corresponding chapter for each chapter of the 2018 IgCC.

The 2018 IgCC was developed to align the technical requirements of ANSI/ASHRAE/ICC/USGBC/IES 189.1-2017-Standard for the Design of High-Performance Green Buildings Except Low Rise Residential Buildings, with ICC’s multi-stakeholder IgCC. Goals of the code are to help governments streamline code development and adoption and improve building industry standardization by integrating the two previously separate guidance documents. As a result, the 2018 IgCC is now a unified code that emphasizes adoption, ease of use and enforcement for building projects. The code is the first fully integrated edition of the IgCC to be developed cooperatively by ICC and ASHRAE.

The 2018 IgCC User’s Manual is now available for purchase.

About International Code Council
The International Code Council is a member-focused association. It is dedicated to developing model codes and standards used in the design, build and compliance process to construct safe, sustainable, affordable and resilient structures. Most U.S. communities and many global markets choose the International Codes.


Founded in 1894, ASHRAE is a global professional society committed to serve humanity by advancing the arts and sciences of heating ventilation, air conditioning, refrigeration and their allied fields.

As an industry leader in research, standards writing, publishing, certification and continuing education, ASHRAE and its members are dedicated to promoting a healthy and sustainable built environment for all, through strategic partnerships with organizations in the HVAC&R community and across related industries.

The Society is showcasing integrated building solutions and sustainability in action through the opening of the ASHRAE Global Headquarters building in metro-Atlanta, Georgia. The state-of-the-art, high-performing net-zero-energy efficient global headquarters building is a destination venue for industry representatives, visiting from around the world, who are looking to experience cutting-edge engineering and architectural interventions.

For more information and to stay up-to-date on ASHRAE, visit and connect on Instagram, LinkedIn, Facebook, Twitter and YouTube.