Wednesday, January 26, 2011

2012 LEED Rating System Development

The United States Green Building Council (USGBC) has released their initial draft version of the LEED 2012 Rating System.  There have been two comment periods released for the public to offer their input towards the LEED 2012 draft version and for future LEED rating systems.  The two comment periods are from November 8, 2011 to January 14, 2011 and from July 1, 2011 to August 15, 2011.  Due to the open comment periods, the current draft version will be subject to modifications and is a work in progress.

According to the USGBC, “future LEED updates will focus on increasing the technical rigor of the rating system, and expanding the market sectors able to use LEED.”[1]  Overall, there are three main categories which differentiate LEED 2009 and LEED 2012 draft version: new credit categories, changes to technical content, and revised point distribution. 

Within the draft version, there are currently three new credit categories: Integrated Process (IP), Location and Transportation (LT), and Performance (PF).  These new categories strive to accomplish two goals: provide a better understanding as to which credits help best optimize important issues, and synchronize organization of the LEED commercial rating and LEED for Homes rating system.  Further explanation of each new category is as follows:

  • ·         Integrated Process (IP)[2]: highlights the importance of the use of iterative, inclusionary process in the   design, construction, operations and maintenance of green projects Location and
  • ·        Transportation (LT)[3]: reorganizes project location, planning and transportation issues into a new category to highlight the importance of and increase dialogue about these issues.  Most of the credits in the new LT category previously existed (in some form) in the Sustainable Sites category.
  • ·       Performance (PF)[4]: highlights the importance of on-going operational performance in LEED projects.  Credits that deal with performance measurement and verification will be reorganized into this category and are intended to be a natural link to USGBC’s Building Performance Partnership (BPP).  The scope of this category includes, but is not limited to: Metering, Commissioning, Utility consumption data reporting, and Occupant comfort/satisfaction surveys.

The point values of the credits will also change and will be weighted as they were for LEED 2009 by using the U.S. Environmental Protection Agency’s Tool for the Reduction and Assessment of Chemical and Other Environmental Impacts (TRACI) categories.  The point allocation was not included in the LEED 2012 draft version for the first comment period but will be completed before the second comment period commences. 

Additional comment periods may be opened as needed for LEED 2012.  The scheduled release of LEED 2012 is set for November 7, 2012.

USGBC, LEED Rating System FAQ,

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