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IDL - Bozeman eNEWS - April 2013 - Vol. 6 No. 4

Entries in LEED V3 (2)

Thursday
Jul022009

USGBC releases LEED V3

The USGBC has recently released the newest version of LEED (v3, 2009).  As of June 27, all new projects will need to register with version 3.  Version 3 boasts several advancements, including harmonization, credit weightings, and regionalization, as well as an updated LEED-online.

"The LEED Green Building Rating Systems are voluntary, consensus-based, and market-driven.  Based on existing and proven technology, they evaluate environmental performance from a whole building perspective over a building’s life cycle, providing a definitive standard for what constitutes a green building in design, construction, and operation," (USGBC, LEED 2009).  LEED was first introduced in 1998, with three new versions having been introduced between then and now.  LEED 2009 has taken the highlights of the previous versions, as well as incorporated some major modifications that will make it a more user friendly resource to better serve building professionals.

Harmonization:  In the latest version of LEED, credits and prerequisites from all commercial and institutional rating systems have been consolidated and aligned based on their most effective common denominators, so credits and prerequisites are now consistent across all 2009 LEED rating systems. 

Credit weightings:  In LEED 2009, a specific amount of points has been allocated to each credit, weighted based on their ability to impact different environmental and human concerns.  More points will be awarded for design strategies based on 13 environmental impact categories.  LEED 2009 uses the U.S. Environmental Protection Agency's TRACI environmental impact categories as the basis for weighting each credit.  It also takes into consideration the National Institute of Science and Technology's (NIST's) weighting system, developed to compare environmental impact categories and weight them against each other.  All LEED rating systems now have 100 possible points, with 10 possible bonus points. 

The LEED 2009 credit weighting process involves three steps.  First, a reference building is used to determine the environmental impacts in 13 categories associated with a typical building pursuing LEED certification.  Next, the relative importance of building impacts in each category are set to reflect values based on the NIST weighting system.  Finally, data that quantifies the building impact on environmental and human health is used to assign points to each individual credit. 

Regionalization:  The new version of LEED also awards points based on regionally specific environmental issues.  For a projects specific location, up to 4 points are available if they address that region's specific environmental issues. 

LEED-online:  The updated LEED-online in version three is now a faster and more user friendly resource.  The improved design has a more intuitive interface, greater help capabilities, and allows for better communication between project teams and certifying boards.

Visit the USGBC website for more information about the newest version of LEED. 

 

Thursday
Jul022009

IDL | Bozeman can help with LEED certification

Are you considering registering a project for LEED certification?  IDL | Bozeman can help!  Involve us early in the design process, so we can make suggestions that will help achieve as many points as possible.  Then, our computer simulations and reports can help you to be awarded up to 20 points, 1 credit for daylighting and up to 19 credits for maximum energy efficiency. 

In order to be awarded Indoor Environmental Quality (IEQ) Credit 8.1: Daylight and Views, 75% of all regularly occupied areas must achieve 25 - 500 footcandles on September 21 at 9am and 3pm.  IDL | Bozeman can create a digital model that will display the footcandles being achieved in the required spaces, suggest modifications that will improve the quality of daylight, and prepare a report that will assist with certification.

IDL | Bozeman can also help with Energy and Atmosphere (EA) Credit 1: Optimize Energy Performance.  This credit is worth up to 19 points.  In order to be awarded any points for this credit, a percentage improvement in the proposed building performance rating compared with the baseline building performance rating, based on Appendix G of ANSI/ASHRAE/IESNA Standard 90.1-2007, must be demonstrated using a computer simulation of the whole building performance.  IDL | Bozeman can create an energy model using eQUEST or Autodesk Ecotect that will simulate energy performance, and compare it with a baseline building. 

If you have any projects you are considering registering for LEED certification, don't forget to contact IDL | Bozeman early in the design process so we can provide maximum assistance with daylight and energy modeling, as we cannot simply provide compliance reports.