LEED v4 : where are we now? Critical assessment through the LCA of an office building using a low impact energy consumption mix

Authors: Lessard, Yannick; Chirjiv, Anand; Blanchet, PierreFrenette, Caroline; Ben Amor
Abstract: Various Green Building Rating Systems (GBRS) have been proposed to reduce the environmental impact of buildings. However, these GBRS, such as LEED v4, are primarily oriented towards a building`s use stage energy consumption. Their application in contexts involving a high share of renewable energy, and hence a low impact electricity mix, can result in undesirable side effects. This paper aims to investigate such effects, based on an existing office building in Quebec (Canada), where more than 95% of the electricity consumption mix is renewable. This paper compares the material impacts from a low-energy context building to material considerations in LEED v4. In addition to their contributions to the building impacts, material impacts are also defined by their potential to change impacts with different material configurations. LCA impacts were evaluated using Simapro 8.2, ecoinvent 3.1 database, and IMPACT 2002+ method. The building LCA results indicated higher environmental impact contributions from materials (> 50%) compared to those from energy consumption. This is in contrast with LEED v4 rating system, as it did not seem to be as effective in capturing such effects. The conclusions drawn from this work will help stakeholders from the buildings sector to have a better understanding of building environmental profiles, and the limitations of LEED v4 in contexts involving a low impact energy mix. In addition, this critical assessment can be used to further improve the LEED certification system.
Document Type: Article de recherche
Open Access Date: 13 November 2018
Document version: AM
Permalink: http://hdl.handle.net/20.500.11794/14124
This document was published in: Journal of industrial ecology, (2017)
Collection:Articles publiés dans des revues avec comité de lecture

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