New Partnership to Harmonize IgCC, ASHRAE 189.1, and LEED
Five major U.S. standard developers—ASHRAE, the American Institute of Architects (AIA), the Illuminating Engineering Society (IES), the International Code Council (ICC), and the U.S. Green Building Council (USGBC)—have agreed to simplify implementation of IgCC, ASHRAE 189.1, and LEED this August and created the new three-part system that integrates codes, standards, and rating systems as parts of one system.The IgCC will become an adoptable, enforceable version of ASHRAE 189.1—it will provide baseline metrics and other technical requirements that align with LEED prerequisites and the IgCC. LEED will allow the IgCC to serve as an alternative system of prerequisites for LEED certification, and selected LEED requirements will be part of ASHRAE 189.1. The new partnership is a major milestone in the history of energy codes not only for finally allowing these tools to work in unison for each other, but also for creating an opportunity for the five leading organizations to develop a strategy with a coherent message that underlies the IgCC, ASHRAE 189.1, and LEED. The new three-part system will also make it easier for jurisdictions to adopt green building codes and streamline the building documentation process. The outcomes of the upcoming October hearings will influence future editions of the IgCC and will be crucial for ensuring the code is on track for the transition.