Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region

Studies have revealed important roles quality indoor environment plays on human health and productivity; consequently, its influence on certain shopping behavior has also been well spelt out. In other to keep up with the demand for quality indoor environment, new trend has been evolving in the desig...

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Main Authors: Aminat Idowu, Ibiyeye, Shari, Zalina, Jaafar, Mohamad Fakri Zaky, Dahlan, Nur Dalilah
Format: Article
Language:English
Published: Faculty of Built Environment, Universiti Teknologi Malaysia 2018
Online Access:http://psasir.upm.edu.my/id/eprint/74647/1/Indoor%20environmental.pdf
http://psasir.upm.edu.my/id/eprint/74647/
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Institution: Universiti Putra Malaysia
Language: English
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spelling my.upm.eprints.746472020-02-26T08:59:15Z http://psasir.upm.edu.my/id/eprint/74647/ Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region Aminat Idowu, Ibiyeye Shari, Zalina Jaafar, Mohamad Fakri Zaky Dahlan, Nur Dalilah Studies have revealed important roles quality indoor environment plays on human health and productivity; consequently, its influence on certain shopping behavior has also been well spelt out. In other to keep up with the demand for quality indoor environment, new trend has been evolving in the design of Malaysian shopping malls. From fully air-conditioned to newly designed ones that integrate passive ventilation strategies; and as such operating under mixed-mode ventilation system. These passive ventilation strategies are implemented to reduce energy consumption and also to improve the indoor environment within the mall’s indoor space. However, the potentials of these designs in terms of their indoor environmental quality (IEQ) performance have not been studied nor have their advantages been revealed. In this study, occupants’ thermal perception and IEQ performance was investigated in two mixed-mode ventilated malls selected based on their design concept (‘open’ and ‘enclosed’). Both subjective and objective measurements were carried out in accordance with the ASHRAE performance measurement protocol for commercial buildings. Five IEQ factors (indoor air temperature, operative temperature, relative humidity, air speed, and carbon dioxide concentration level) were evaluated in the two malls. The results revealed that both malls fell below the ASHRAE comfort requirement but majority of the occupants still found the indoor thermal performance acceptable despite the high indoor air temperature recorded. For both malls, high air speed and low humidity level were recorded. However, higher air movement was still preferred by the occupants while the recorded mean carbon dioxide (CO2) concentration was within the recommended level. The ‘open’ concept mixed-mode ventilated mall proved superior compared to the ‘enclosed’ concept by providing a more thermally tolerance indoor environment for its occupants. Generally, results from this study contribute to the knowledge on the advantages of adopting sustainable designs in commercial buildings for improving the indoor environment as well as the health and general well-being of the occupants. The study will open more opportunities for future IEQ studies to be carried out in hot-humid climatic regions. Faculty of Built Environment, Universiti Teknologi Malaysia 2018 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/74647/1/Indoor%20environmental.pdf Aminat Idowu, Ibiyeye and Shari, Zalina and Jaafar, Mohamad Fakri Zaky and Dahlan, Nur Dalilah (2018) Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region. International Journal of Built Environment and Sustainability, 5 (3). 187 - 200. ISSN 2289-8948 10.11113/ijbes.v5.n3.289
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Studies have revealed important roles quality indoor environment plays on human health and productivity; consequently, its influence on certain shopping behavior has also been well spelt out. In other to keep up with the demand for quality indoor environment, new trend has been evolving in the design of Malaysian shopping malls. From fully air-conditioned to newly designed ones that integrate passive ventilation strategies; and as such operating under mixed-mode ventilation system. These passive ventilation strategies are implemented to reduce energy consumption and also to improve the indoor environment within the mall’s indoor space. However, the potentials of these designs in terms of their indoor environmental quality (IEQ) performance have not been studied nor have their advantages been revealed. In this study, occupants’ thermal perception and IEQ performance was investigated in two mixed-mode ventilated malls selected based on their design concept (‘open’ and ‘enclosed’). Both subjective and objective measurements were carried out in accordance with the ASHRAE performance measurement protocol for commercial buildings. Five IEQ factors (indoor air temperature, operative temperature, relative humidity, air speed, and carbon dioxide concentration level) were evaluated in the two malls. The results revealed that both malls fell below the ASHRAE comfort requirement but majority of the occupants still found the indoor thermal performance acceptable despite the high indoor air temperature recorded. For both malls, high air speed and low humidity level were recorded. However, higher air movement was still preferred by the occupants while the recorded mean carbon dioxide (CO2) concentration was within the recommended level. The ‘open’ concept mixed-mode ventilated mall proved superior compared to the ‘enclosed’ concept by providing a more thermally tolerance indoor environment for its occupants. Generally, results from this study contribute to the knowledge on the advantages of adopting sustainable designs in commercial buildings for improving the indoor environment as well as the health and general well-being of the occupants. The study will open more opportunities for future IEQ studies to be carried out in hot-humid climatic regions.
format Article
author Aminat Idowu, Ibiyeye
Shari, Zalina
Jaafar, Mohamad Fakri Zaky
Dahlan, Nur Dalilah
spellingShingle Aminat Idowu, Ibiyeye
Shari, Zalina
Jaafar, Mohamad Fakri Zaky
Dahlan, Nur Dalilah
Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region
author_facet Aminat Idowu, Ibiyeye
Shari, Zalina
Jaafar, Mohamad Fakri Zaky
Dahlan, Nur Dalilah
author_sort Aminat Idowu, Ibiyeye
title Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region
title_short Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region
title_full Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region
title_fullStr Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region
title_full_unstemmed Indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region
title_sort indoor environmental quality performance of mixed-mode ventilated shopping malls in hot-humid climatic region
publisher Faculty of Built Environment, Universiti Teknologi Malaysia
publishDate 2018
url http://psasir.upm.edu.my/id/eprint/74647/1/Indoor%20environmental.pdf
http://psasir.upm.edu.my/id/eprint/74647/
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