LEED v4.1. BD+C - what's new in the LCA credit?What’s new in LEED v4.1 BD+C for Whole-Building Life-Cycle Assessment
Changes to Whole-Building Life-Cycle Assessment in LEED v4.1LEED v4.1 introduces a number of changes that make materials credits more accessible for projects, and moreover, the Minimum and Optimize Energy Performance credits are also now weighed by both the cost and their greenhouse gas emissions for the first time. This is a run-down of the draft version of the LEED v4.1. BD+C manual.
MR Credit: Building Life-Cycle Impact Reduction, Option 4. Whole Building Life Cycle AssessmentSummary of changes:
- Credit is more focused on carbon reduction, extra weight on the global warming potential
- Credit offers a starting point of one point for doing an LCA, without comparison
- Credit points are tiered based on performance improvement, so you can get between 2 to 4 points depending on reductions you achieve
|Paths||Requirements for the path in LEED v4.1||Points|
|Path 1||Conduct a life cycle assessment of the project’s structure and enclosure||1 point|
|Path 2||Conduct an LCA for structure and enclosure that demonstrates a minimum of 5% reduction in global warming potential and two other impact categories 2 points||2 points|
|Path 3||Conduct an LCA for structure and enclosure that demonstrates a minimum of 10% reduction in global warming potential and two other impact categories 3 points||3 points|
|Path 4||Incorporate building reuse and/or salvage materials into the project’ s structure and enclosure for the proposed design. Demonstrate reductions compared with a baseline building of at least 20% for global warming potential and at least a 10% reduction in two other impact categories||4 points|
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