After gathering feedback from project teams, this credit includes the next iteration of Pilot Credit 1: Life Cycle AnalysisAn evaluation of the environmental effects of a product or activity holistically, by analyzing the entire life cycle of a particular material, process, product, technology, service, or activity. of Building Assemblies and Materials. The intention of this pilot is to tie LCA evaluation to design decisions, and test the availability of LCIA data from product manufacturers. Structural and envelope material selections are often the first decisions made on a project, LCA is a tool best used to analyze the impact of structural and envelope materials before the project’s design is finalized.
The reason for limiting the scope of the Life Cycle Assessment to structure and enclosure materials is due to current life cycle inventoryAn accounting of the energy and waste associated with the creation of a new product through use and disposal. databases populations being concentrated in these materials areas. Further, isolating structural materials targets environmental per-formance of these materials with inherently different nature in buildings.
This updated pilot credit is the next step in the evolution of LEED actively engaging life cycle assessment in material decision making for buildings and thus an initial step in quantifying environmental benefit for materials decisions.
The ides of this credit is to explore the holistic environmental impacts of material selec-tion for structure and assembly. At a minimum submit summary life cycle inventory and assessment results for the materials and assemblies explored. As well as a comprehensive narrative outlining why the assemblies chosen were compared, any conclusions learned as part of the process, and any decisions made as a result of the study. If the project does not have an energy model ensure the same operational energy use is used in all assessments. The software tools approved for use in this pilot credit are the Athena Impact Estimator, GaBi, and SimaPro. If other tools are used please provide evidence that the tool meets the ISO requirements.
Excerpted from LEED 2009 for New Construction and Major Renovations
To increase the use of products and materials with life cycles and ingredients that improve overall environmental, economic and social performance.
* This credit language is drawn from the LEED v4 draft. Where other point totals are noted, this pilot credit is worth 1 point in total. *
For new construction (buildings or portions of buildings), conduct a life-cycle assessment of the project’s structure and enclosure that demonstrates a minimum of 10% reduction, compared with a baseline building, in at least three of the six impact categories listed below, one of which must be global warming potential. No impact category assessed as part of the life-cycle assessment may increase by more than 5% compared with the baseline building.
The baseline and proposed buildings must be of comparable size, function, orientation, and operating energy performance as defined in EA Prerequisite Minimum Energy Performance. The service life of the baseline and proposed buildings must be the same and at least 60 years to fully account for maintenance and replacement. Use the same life-cycle assessment software tools and data sets to evaluate both the baseline building and the proposed building, and report all listed impact categories. Data sets must be compliant with ISO 14044.
Select at least three of the following impact categories for reduction:
Register for the pilot credit
The idea of this credit is to explore the holistic environmental impacts of material selection for structure and assembly. At a minimum submit summary life cycle inventoryAn accounting of the energy and waste associated with the creation of a new product through use and disposal. and assessment results for the materials and assemblies explored. As well as a comprehensive narrative outlining why the assemblies chosen were compared, any conclusions learned as part of the process, and any decisions made as a result of the study. If the project does not have an energy model ensure the same operational energy use is used in all assessments. The software tools approved for use in this pilot credit are the Athena Impact Estimator, GaBi, and SimaPro. If other tools are used please provide evidence that the tool meets the ISO requirements.
Background for the LEED Pilot Credit Library is provided in this foundational document.
The homepage for the LEED Pilot Credit Library. The LEED Pilot Credit Library is intended to facilitate the introduction of new prerequisites and credits to LEED. This process will allow USGBC to test and refine credits through LEED 2009 project evaluations before they are sent through the balloting process for introduction into LEED.
We are working in project that it's using pilot credit.
We would like to know if there are any learned lessons for V4 credit. Do you have any experience with this issue?.
Thanks in advantage
I’m sure everyone has a lot of opinions, but here are a few basic things that come to mind:
1. Start early. This credit should be used to shape the design, not to retroactively justify a reference building. Starting early lets you explore what is causing the impacts in your design, and then figure out how to minimize them.
2. Be wary of the “parametric” building designs / options in some programs where you input some basic geometry and framing parameters and the program generates a bill of materials. Those can be helpful for VERY rough comparisons, and perhaps for component placeholders if you are not optimizing that part of the system. However, I have found them to be too coarse to model the part(s) of the system you are trying to optimize to achieve impact reductions. Also, with BIM models today it is relatively easy to extract your actual quantities.
3. Engage the professional designing the parts of the system that you are optimizing. For example, if your strategy involves structural optimization make sure your structural engineer is involved, similarly for enclosure and the enclosure designer / engineer.
I hope that helps.
I want to know whether LEED is accepting the results of whole building LCA conducted by using Athena Impact Estimator for a Building in SriA measure of the constructed surface's ability to stay cool in the sun by reflecting solar radiation and emitting thermal radiation. It is defined such that a standard black surface (initial solar reflectance 0.05, initial thermal emittance 0.90) has an initial SRI of 0, and a standard white surface (initial solar reflectance 0.80, initial thermal emittance 0.90) has an initial SRI of 100. To calculate the SRI for a given material, obtain its solar reflectance and thermal emittance via the Cool Roof Rating Council Standard (CRRC-1). SRI is calculated according to ASTM E 1980. Calculation of the aged SRI is based on the aged tested values of solar reflectance and thermal emittance. Lanka.(Since it is only for North America)
Or else what are the recommended databases and software which are geographically cover south Asian region?
Is one click LCA an accepted tool to demonstrate compliance with this credit?
I am conducting this survey in affiliation with University of Cincinnati for my Master's thesis in support of my hypothesis. It would just take 10-15 minutes of your time and by completing this survey you would help me in giving my research the required depth in understanding the achievability of the credit points in the Material and Resource category of LEED v2009 and v2013. I will send in the end results of this survey to you, which could potentially make your decision process easier on any future LEED Registered projects you intend to work on.
The following is the link to my survey:
Every response is valuable to my research.Thank you in advance for your time.
We are three students writing our respective theses on building life-cycle assessment"1. An evaluation of the environmental effects of a product from cradle to grave, as defined by ISO 14040-2006 and ISO 14044-2006.
2. The practice of quantifying and characterizing all the resource and pollution flows associated with a process or product, for the purpose of documenting its environmental impact. It is defined by the International Organization of Standardization (ISO) as a compilation and evaluation of the inputs" and the tools related to it - your time filling up our questionnaire would be much appreciated and help us achieve results relevant for the industry and for your business!
Answer here: http://goo.gl/forms/iUueUAHIeM - it only takes 5-10 minutes!
About us: Arturs is studying Real Estate Management (McS.) in Aalto University of Technology, where as Reija and Pierre are studying Environmental Engineering (BcS.) and and Civil Engineering (BcS.) in Metropolia University of Applied Sciences respectively.
There are secral tools that can be used for LCA but it appears that some tools are more detailed than others. In europe the calculation methods seems to go into great detail. I think its great that LEED has added this on to the LEED v4.
Resurrecting Mark Webster’s previous thread – I am finalizing a PC 63 submission and I’m curious what strategy others have used to define the reference building. Ours has been to use typical structural and enclosure systems used for a building of the same function in the project location based on our previous design portfolio and general knowledge of the market. What approach have others used?
Also, what software are people using? We have used both ATHENA and Tally.
We are about to submit our project as well so I do not have experience on how this credit is evaluated. As the baseline we have used typical building materials that are used for this type of building. This is how the initial study was conducted but the credit language asks that the base buildingThe base building includes elements such as the structure, envelope, and building-level mechanical systems, such as central HVAC, and materials and products installed in the project (e.g., flooring, casework, wall coverings). to be modelled as per the base building in our energy model. As our building is not located in the US we chose to use a base building based on a typical warehouse building in the country.
We have used Elodie a french programme that completes a WBLCA as the data set is compliant with ISO 14044.
Let’s suppose a building is designed to use a material that although it has high embodied energy1. Embodied energy is the energy used during the entire life cycle of a product, including its manufacture, transportation, and disposal, as well as the inherent energy captured within the product itself.
2. The energy expended in the process of creating a product, often including the fuel value of its constituent parts as well as transportation to its point of use. (concrete), it will improve the operational thermal performance due to thermal mass and the overall life cycle result is better. This is the whole of building approach, including both operational and embodied impacts. Will the 10% reduction target include whole building savings, accounting for both embodied and operational impacts?
Henrique, the credit language requires the building and the baseline building you are comparing to be of comparable operating energy performance. While using concrete as a means of improving the operational performance of the building may be beneficial through the entire life of the building when looking at environmental impacts from both materials and operations, the intent of this credit is to look at the impacts from materials only.
Is there any guidance regarding LCI datasets? In particular, expectations regarding regional specifics?
Oliver, the scope is speific to embodied carbon in structural systems. See the credit language above for more detail.
How have project teams been defining the reference building for this credit?
Most if not all construction sites have a generator running to power the site. On new SF home construction the amount of gasoline used during the construction phase is about 100-150 gallons. Are LEED points awarded for using a renewable energy source to power the site, thus reducing the amount of embodied energy1. Embodied energy is the energy used during the entire life cycle of a product, including its manufacture, transportation, and disposal, as well as the inherent energy captured within the product itself.
2. The energy expended in the process of creating a product, often including the fuel value of its constituent parts as well as transportation to its point of use..
Jody, construction activity like powering a generator would not typically be in the scope of this credit or most other LEED credits, but you should check out the clean construction pilot credit.
I had a designer come back from Green Build talking about life cycle assessments for individual furniture pieces. Free standing desks, tables, and office furniture in general. Is anyone familiar with this? Where would it qualify?
Ronnie, an LCA for a specific building product is not applicable under this Pilot Credit, but it will matter under LEED v4, and possibly under other pilot credits.
1) Is it acceptable to submit this as an ID point, outside of the pilot process?
2) I know this is probably a stretch, but what do you think about attempting more than 1 point for this if we were to go beyond the 10% improvement, similar to other credits (i.e. water use reduction awards and add'l point for each 5% increment of improvement..)??
Alexandra, 1) I would assume not, since USGBC is specifically offering this credit as pilot credit, which is one of the paths in IDc1. 2) I don't think that would work. There are pilot credits where thresholds are identified for the purpose of defining the credit parameters, but still only one point is awarded. This would be like getting an EP point, and pilot credits aren't identified as offering EP points.
Are Athena Impact Estimator is suitable for this pilot credit.
Murat, the Athena calculator is one of the accepted tools for this credit—as noted above on this same page.
Technical Director, LEED
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