Abstract
This study aims to explore the influence of project size on the Energy and Atmosphere (EA) credits in the Leadership in Energy and Environmental Design for New Construction and Major Renovations (LEED-NC) version 3 (v3) in California and version 4 (v4) in the United States (US) in office-type projects. If the relationship between the ordinal data of EA credits and project size changed monotonically, then Spearman’s correlation coefficient was used. If the relationship between the EA credits ordinal data and project size did not change monotonically, then the EA credit data were divided into below and above the median project size groups, and, as a consequence, the Cliff′s δ effect size and exact Wilcoxon–Mann–Whitney tests were used. If the EA credits were binary or dichotomous data, then the natural logarithm of the odds ratio and Fisher’s exact 2 × 2 test with Lancaster’s mid-p-value were used. The results showed that the performance of operational energy, enhanced the refrigerant management and that the renewable energy credits in LEED-NC v3/v4 Certified, Silver, and Gold projects depended on the project size. We concluded that the LEED project size is an important variable for developing LEED-NC strategies for office-type projects.
Highlights
LEED-NC Version 3 (v3) and 4 (v4)During the last few decades, Leadership in Energy and Environmental Design (LEED)has gained high popularity as a system that rates building design on an environmental scale [1]
The aim of the present study is to evaluate the effects of the LEED project size on achieving Energy and Atmosphere (EA) credits in the LEED-NC v3/v4 office-type projects
The LEED certification strategy is influenced by many factors, such as the space-type, project size, and building technology
Summary
LEED-NC Version 3 (v3) and 4 (v4)During the last few decades, Leadership in Energy and Environmental Design (LEED)has gained high popularity as a system that rates building design on an environmental scale [1]. LEED-NC Version 3 (v3) and 4 (v4). During the last few decades, Leadership in Energy and Environmental Design (LEED). Has gained high popularity as a system that rates building design on an environmental scale [1]. The system was designed for the United States (US) by the US Green Building. According to the USGBC website, LEED-NC with its two latest versions, version 3 (v3) and 4 (v4), is the most popular system within LEED rating systems [2]. LEED-NC v3 and v4 were the focus of this study. Both LEED-NC v3 and v4 comprise several similar environmental categories, each of them with one/several relevant credits, and both versions include 110 points in total [2]
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