Indoor Environmental Quality, Occupants’ Satisfaction And Perceived Productivity In Green Building Index Rated Office Buildings
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Date
2018-09
Authors
Asniza Hamimi Abdul Tharim
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The aim of this research is to examine the objective and subjective measurements of overall indoor environmental quality (IEQ) in Green Building Index (GBI) Non-Residential New Construction (NRNC) office buildings located in Kuala Lumpur and Putrajaya, Malaysia. This is also to identify the influence of various façade designs that are implemented in the selected GBI NRNC office buildings. This research not only focuses on the aspects of the IEQ levels in the selected case study buildings, but it also tests the relationship between IEQ and Occupants’ Perceived Productivity with Occupants’ Satisfaction as mediator. The research methodology adopted for this research is divided into two types which are the objective (fieldwork) and subjective (questionnaire survey in the form of post occupancy evaluation) measurements. Subsequently, in order to investigate the current performance of IEQ in the selected GBI NRNC office buildings, a series of fieldwork measurement were conducted in the buildings i.e., ST Building, PJH Building, MITI Building and KKR2 Building. Indoor and outdoor environments were monitored in this research to evaluate the IEQ performance of these building with various façade design. Concurrently, the POE survey on IEQ assessment were distributed and collected amongs occupants in the buildings. Using the purposive sampling techniques, 302 responses were analyzed using the partial least squares structural equation modeling. Results from the objective measurement (fieldwork) revealed that the current performance of the selected case study buildings were acceptable within the range stipulated by GBI NRNC Tools. It was found that, in overall, the PJH Building’s low-e curtain walling façade with vertical fins shading façade design provide the best performance of IEQ in this research. Meanwhile, the subjective measurement (POE survey) results of this research revealed that there was a significant relationship between IEQ and Perceived Productivity with Occupants’ Satisfaction as mediator. Theoretically, this research contributes to the literature by validating the IEQ model to include the building characteristic (façade) as one of the IEQ predictors and also to include the mediating role of Occupants’ Satisfaction between IEQ and Perceived Productivity in an office building.
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Keywords
Sustainable development , Office buildings