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UNIVERSITI PUTRA MALAYSIA
IBIYEYE AMINAT IDOWU
FRSB 2014 7
OCCUPANCY SATISFACTION LEVEL AND VENTILATION BEHAVIOUR IN FIVE (5) TYPES OF HOUSING IN PUTRAJAYA, MALAYSIA
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OCCUPANCY SATISFACTION LEVEL AND VENTILATION
BEHAVIOUR IN FIVE (5) TYPES OF HOUSING IN PUTRAJAYA,
MALAYSIA
By
IBIYEYE AMINAT IDOWU
Thesis submitted to the School of Graduate Studies, Universiti Putra Malaysia, in
Fulfilment of the Requirement for the Degree of Master of Science
June, 2014
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COPYRIGHT
All material contained within the thesis, including without limitation text, logos,
icons, photographs and all other artwork, is copyright material of University Putra
Malaysia unless otherwise stated. Use may be made of any material contained
within the thesis for non-commercial purposes from the copyright holder.
Commercial use of material may only be made with the express, prior, written
permission of University Putra Malaysia.
Copyright © Universiti Putra Malaysia
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DEDICATION
This thesis is dedicated to Almighty Allah, He who taught Man by the pen and
taught him that which he knew not.
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Abstract of thesis presented to the Senate of Universiti Putra Malaysia in fulfilment
of the requirement for the degree of Master of Science
OCCUPANCY SATISFACTION LEVEL AND VENTILATION
BEHAVIOUR IN FIVE (5) TYPES OF HOUSING IN PUTRAJAYA,
MALAYSIA
By
IBIYEYE AMINAT IDOWU
June, 2014
Chairman: Dr. Mohamad Fakri Zaky Bin Ja'Afar
Faculty: Faculty of Design and Architecture
As individuals tend to attain desirable comfort level in their homes, the quality of
the indoor air in the home is being threatened. To attain this level of comfort,
occupants employ mechanical cooling strategy due to the high temperature and
humidity they experience. However this comfort could still be attained through
proper natural ventilation without jeopardising the indoor air quality (IAQ).
Although, natural ventilation has been revealed to be a good alternative to
mechanical cooling both from thermal comfort and IAQ perspectives, air-
conditioner (AC) usage is still prevalent in the home and occupants seldom utilise
natural ventilation through window openings. Numerous studies on the utilization of
natural ventilation in homes have been conducted but in depth studies of the natural
ventilation provisions and occupants’ behaviour towards these provisions in relation
to IAQ in hot-humid climate are still very limited. Therefore, this study aims to
investigate natural ventilation provisions of residential buildings in hot-humid
climate under different terraced house design types, with the following objectives: 1)
To identify natural ventilation provisions in selected housing design types with
reference to Uniform Building By-Law (UBBL) requirements. 2) To determine the
ventilation rates delivered by the natural ventilation provisions in the selected
housing design types through computer simulation. 3) To assess occupants’
utilisation of natural ventilation provisions and their level of satisfaction by taking
into account the UBBL requirements and the ventilation rates of the building spaces.
Five house design types were selected in Putrajaya for the study and natural
ventilation provisions were identified through acquired building documents. A total
of 298 households from among the selected house design types were surveyed and
computer simulations with Integrated Environmental Solution <Virtual
Environment> (IES<VE>) were carried out on the entire house types to determine
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the ventilation rates. Two house design types were found not to comply with the
UBBL 10% window area requirement and the level of AC usage was high mostly in
the master bedroom. Respondents were found to open windows mostly during the
daytime and their level of satisfaction with indoor ventilation when utilizing natural
ventilation was found to be significantly related to opening sizes that are in
accordance with UBBL, longer duration of opening windows and means of
achieving comfort. From the simulation, house types that comply with UBBL 10%
window area requirement were found to exhibit higher ventilation rates due to their
large opening area. Findings from this study will shed more light on behavioural
pattern of occupants of residential buildings towards natural ventilation provisions
and highlight the importance of conforming to the law governing the provisions for
natural ventilation in residential buildings.
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Abstrak tesis yang dikemukakan kepada Senat Universiti Putra Malaysia sebagai
memenuhi keperluan untuk ijazah Master Sains
Penilaian tahap kepuasan penghuni rumah dan ciri-ciri pengudaraan di lima
(5) jenis perumahan di Putrajaya, Malaysia
By
IBIYEYE AMINAT IDOWU
Jun, 2014
Pengerusi: Dr. Mohamad Fakri Zaky Bin Ja'Afar
Fakulti: Fakulti Rekabentuk dan Senibina
Sebagaimana setiap individu cenderung untuk mencapai tahap keselesaan yang
diimpikan untuk kediaman mereka, kualiti udara di dalam ruang kediaman sering
diabaikan. Untuk mencapai tahap keselesaan tersebut, penghuni rumah
menggunakan strategi penyamanan mekanikal untuk meredakan suhu tinggi dan
kelembapan yang mereka alami. Walaubagaimanapun, kenyamanan udara ini
sebenarnya mampu dicapai melalui rekabentuk pengudaraan semulajadi yang betul
tanpa mengorbankan kualiti udara dalam rumah (Indoor Air Quality-IAQ).
Walaupun pengudaraan semulajadi telah terbukti menjadi alternatif terbaik kepada
penyamanan mekanikal bagi mengatasi kepanasan dan perspektif IAQ, penggunaan
penyaman udara masih menjadi kelaziman di dalam rumah dan penghuni rumah
jarang menggunakan pengudaraan semulajadi melalui pembukaan tingkap.
Kebanyakan kajian ke atas penggunaan pengudaraan semulajadi telah dijalankan
namun kajian mendalam terhadap pengudaraan semulajadi yang tersedia dan sikap
penghuni rumah terhadap kemudahan ini berkaitan dengan IAQ dalam cuaca panas
dan lembap adalah masih terhad. Oleh itu, kajian ini adalah untuk menyiasat
pengudaraan semujadi tersedia untuk premis kediaman dalam cuaca panas dan
lembap bagi pelbagai jenis rekabentuk rumah teres, dengan objektif berikut: 1)
Untuk menilai pengudaraan semulajadi bagi jenis rekabentuk rumah terpilih dengan
berpandukan syarat UBBL. 2) Untuk menentukan kadar pengudaraan yang diberikan
oleh pengudaraan semulajadi tersedia bagi jenis rekabentuk rumah terpilih melalui
simulasi komputer. 3) Untuk menyiasat penggunaan pengudaraan semulajadi oleh
penghuni rumah dan tahap kepuasan mereka dengan mengambil kira keperluan
UBBL dan kadar pengudaraan ruang bangunan. Lima jenis rekabentuk rumah telah
terpilih di sekitar Putrajaya untuk kajian ini dan jenis pengudaraan semulajadi
tersedia dikenalpasti daripada dokumen bangunan. Kajian dijalankan ke atas 298
rumah daripada jenis rekabentuk rumah terpilih dan simulasi komputer dengan
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menggunakan aturcara Intergrated Environment Solution <Virtual Environment>
(IES<VE>) telah dijalankan ke atas kesemua jenis rumah untuk menentukan kadar
pengudaraan. Dua jenis rekabentuk rumah didapati tidak mematuhi UBBL yang
mengkehendaki keperluan 10% ruang untuk tingkap dan tahap penggunaan
penghawa dingin adalah tinggi terutamanya di bilik tidur utama. Penghuni kediaman
didapati membuka tingkap pada waktu siang dan tahap kepuasan terhadap
pengudaraan dalam rumah apabila menggunakan pengudaraan semulajadi adalah
berkait secara signifikan dengan saiz pembukaan runag pengudaraan yang tertakluk
dengan UBBL, tempoh pembukaan tingkap yang lama dan bermaksud untuk
mencapai keselesaan. Dari keputusan simulasi, jenis rumah yang mematuhi
peraturan 10% ruang tingkap UBBL mempamerkan kadar pengudaraan yang lebih
tinggi disebabkan ruang pembukaan lebih luas. Hasil dari kajian ini akan
menjelaskan corak kelakuan penghuni premis kediaman terhadap pengudaraan
semulajadi tersedia dan menekankan kepentingan mematuhi piawai yang ditetapkan
untuk penyediaan ruang pengudaraan semulajadi bagi bangunan kediaman.
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ACKNOWLEDGEMENT
I would never have been able to finish my study without the guidance of Almighty
Allah, my committee members, help from friends, and support from my family.
I will like to express the deepest appreciation to my committee chair Dr. Mohamad
Fakri Zaky Bin Ja'Afar for his guidance, care, patience, and providing me with an
excellent atmosphere for doing my research. I would like to thank my supervisory
committee member Dr. Zalina Shari, whom Allah chose as guidance for me
throughout the course of my study. I am grateful for your constant help and support.
I would like to thank Maszura Abdul Ghafar and Nurhidayah Mohd Radzi who as
good friends were always willing to help. It would not have been a smooth ride
without the two of them. Many thanks to Mohd Amirul Hussain, Mustaza Fabri
Amir, and Ronizam Ahmad who took their time to help during the data collection
stages and Mr. Husam Abdul Fatah Haron for his guidance and contribution. My
appreciation also goes to all staffs and members of the Faculty of Design and
Architecture, Universiti Putra Malaysia for their hospitality.
I would also like to thank my parents, in-laws and my siblings who have always
supported me and encouraged me with their prayers. Finally, I would like to thank
my husband, who has always been there for me, cheering me up and stood by me
through the good and bad times. He has always been a source of inspiration for me.
This work was supported by the Malaysian Ministry of Higher Education, under
Exploratory Research Grant Scheme (ERGS/1/11/SSI/UPM/01/8).
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I certify that a Thesis Examination Committee has met on 4th June, 2014 to conduct
the final examination of Ibiyeye Aminat Idowu on her thesis entitled “Occupancy
satisfaction level and ventilation behavior in five types of housing in Putrajaya,
Malaysia” in accordance with the Universities and University Colleges Act 1971
and the Constitution of the Universiti Putra Malaysia [P.U.(A) 106] 15 March 1998.
The Committee recommends that the student be awarded the Master of Science.
Members of the Thesis Examination Committee were as follows:
Kamariah bint Dola, PhD
Associate Professor
Faculty of Design and Architecture
Universiti Putra Malaysia
(Chairman)
Lar. Suhardi bin Maulan, PhD
Faculty of Design and Architecture
Universiti Putra Malaysia
(Internal Examiner)
Nangkula Utaberta, PhD
Associate Professor. Ir.
Faculty of Design and Architecture
Universiti Putra Malaysia
(Internal Examiner)
Abdul Malek Abdul Rahman, PhD
Associate Professor
School of Housing, Building and Planning
Universiti Sains Malaysia
(External Examiner)
NORITAH OMAR, PhD
Associate Professor and Deputy Dean
School of Graduate Studies
Universiti Putra Malaysia
Date: 21 July 2014
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This thesis was submitted to the Senate of Universiti Putra Malaysia and has been
accepted as fulfillment of the requirement of the degree of Master of Science. The
members of the Supervisory Committee were as follows:
Mohamad Fakri Zaky Bin Ja'Afar, PhD
Department of Architecture
Universiti Putra Malaysia
(Chairman)
Zalina Shari, PhD
Department of Architecture
Universiti Putra Malaysia
(Member)
BUJANG KIM HUAT, PhD
Professor and Dean
School of Graduate Studies
Universiti Putra Malaysia
Date:
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DECLARATION
Declaration by Graduate Student
I hereby confirm that:
this thesis is my original work;
quotations, illustrations and citations have been duly referenced;
this thesis has not been submitted previously or concurrently for any other
degree at any institutions;
intellectual property from the thesis and copyright of thesis are fully-owned by
Universiti Putra Malaysia as according to the Universiti Putra Malaysia
(Research) Rules 2012;
written permission must be obtained from supervisor and Deputy Vice–
chancellor (Research and innovation) before thesis is published (in the form of
written, printed or in electronic form) including books, journals, modules,
proceedings, popular writings, seminar papers, manuscripts, posters, reports,
lecture notes, learning modules or any other materials as stated in the Universiti
Putra Malaysia (Research) Rules 2012;
there is no plagiarism or data falsification/fabrication in the thesis and scholarly
integrity was upheld as according to the Universiti Putra Malaysia (Graduate
Studies) Rules 2003 (Revision 2012-2013) and the Universiti Putra Malaysia
(Research) Rules 2012. The thesis has undergone plagiarism detection software
Signature: ------------------------------- Date: 4 June, 2014
Name and Matric No: IBIYEYE AMINAT IDOWU (GS32280)
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Declaration by Members of Supervisory Committee
This is to confirm that:
the research conducted and the writing of this thesis was under our
supervision
Supervision responsibilities as stated in Rule 41 in Rules 2003 (Revision
2012- 2013) were adhered to.
Signature -------------------------------
Name of
Chairman of
Supervisory Committee: Mohamad Fakri
Zaky Bin Ja'Afar, PhD
Signature -------------------------------
Name of
Member of
Supervisory Committee: Zalina Shari, PhD
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TABLE OF CONTENTS
Page
ABSTRACT iv
ABSTRAK vi
ACKNOWLEDGEMENT viii
APPROVAL ix
DECLARATION xi
LIST OF TABLES xvi
LIST OF FIGURES xvii
LIST OF ABBREVIATIONS xix
CHAPTER
1 INTRODUCTION 1
1.1 Background 1
1.2 Problem statement 2
1.3 Main research question 4
1.3.1 Sub research questions 4
1.4 Research objectives 4
1.5 Significance of the study 5
1.6 Thesis structure 5
2 LITERATURE REVIEW 7
2.1 Introduction 7
2.2 Ventilation 7
2.2.1 Purpose of ventilation 7
2.3 Thermal comfort 8
2.3.1 Thermal indices 8
2.4 Indoor air quality 10
2.4.1 Inorganic contaminants 10
2.4.2 Contaminants generated by combustion 10
2.4.3 Organic contaminants 11
2.4.4 Biological contaminants 11
2.5 Indoor Air Quality (IAQ) in residential buildings 12
2.5.1 Indoor Air Quality standards 12
2.5.2 Air exchange rate (ACH) 14
2.5.3 Factors influencing ACH 16
2.6 Natural ventilation 17
2.6.1 Air pressure ventilation or wind force 17
2.6.2 Stack effect ventilation or thermal force 19
2.6.3 Factors influencing wind flow in natural ventilation 20
2.6.4 Occupants’ satisfaction regarding ventilation in
residential buildings
21
2.6.5 Occupants’ ventilation behavior 21
2.7 Natural ventilation and IAQ studies in residential
buildings
22
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2.7.1 Studies in Southeast Asia 23
2.7.2 Studies in Malaysia 24
2.8 Chapter summary and Research gap 27
3 METHODS 30
3.1 Introduction 30
3.2 Research methodology 30
3.2.1 Malaysian residential buildings 31
3.2.2 Malaysian terraced houses 32
3.3 Study area 33
3.4 House selection and design review 33
3.4.1 Window/floor area percentage 35
3.4.2 Description of the five (5) selected house types 35
3.5 Computer simulation 38
3.5.1 Stage 1: Geometry generation 38
3.5.2 Stage 2: Natural ventilation analysis 40
3.5.3 Stage 3: Running the simulation 41
3.5.4 Result viewer 41
3.6 Questionnaire survey 42
3.6.1 Sample selection 42
3.6.2 Survey instrument 43
3.6.2.1 General questions 43
3.6.2.2 Means of achieving comfort 43
3.6.2.3 Occupants’ ventilation behaviour 43
3.6.2.4 Evaluation of natural ventilation and
occupants’ level of satisfaction
44
3.6.3 Pilot study 44
3.6.4 Procedure for conducting the survey 45
3.6.5 Data analysis 47
3.6.6 Ordinal regression 48
3.7 Chapter summary 49
4 RESULT AND DISCUSSION 50
4.1 Introduction 50
4.2 Results 50
4.2.1 Review of window designs 50
4.2.2 Computer simulation results 54
4.2.3 Survey results 58
4.2.3.1 Demographic characteristics 58
4.2.3.2 Occupants’ means of achieving comfort 58
4.2.3.3 Occupants’ ventilation behaviour 63
4.2.3.4 Reasons for opening and not opening
windows
67
4.2.3.5 Evaluation of natural ventilation and
occupants’ level of satisfaction
69
4.2.3.6 General comments 69
4.2.3.7 Regression Analysis 70
4.3 Discussion 73
4.3.1 Ventilation provisions in accordance with UBBL 73
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requirements
4.3.2 Occupants’ ventilation behavior 74
4.3.3 Level of satisfaction with indoor ventilation 75
4.4 Chapter summary 77
5 CONCLUSION AND RECOMMENDATION 78
5.1 Conclusions 78
5.2 Future research 82
REFERENCES 83
APPENDICES 97
BIODATA OF STUDENT 120
LIST OF PUBLICATIONS 121
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LIST OF TABLES
Table Page
2.1 Ventilation air requirement (L/s) 12
2.2 List of indoor air contaminants and the acceptable limits 13
2.3 Minimum ventilation rates in breathing zone 15
2.4 Summary of natural ventilation and IAQ studies in South-East Asia 24
3.1 Design classification of house types and their total number of units 34
3.2 Total floor area of living spaces in all house design types 36
3.3 Monthly dry and wet bulb temperature, Kuala Lumpur Subang. 39
3.4 Classification of house design types and total questionnaire
distributed and collected
42
4.1 Window design and window/floor area percentage of the studied
living spaces in each house types 53
4.2 Simulation results for when windows are left open at all times 54
4.3 Simulation results for when windows are opened between 6 AM–10
PM
56
4.4 Occupants demographic characteristics 58
4.5 Frequent distribution of the means of achieving comfort in living
spaces amongst respondents who owned AC
61
4.6 Percentage distribution of respondents by duration of opening
windows in all living spaces
66
4.7 Mean response of occupants’ evaluation of natural ventilation in
respect to perception of indoor humidity, perceived air, indoor
temperature and level of satisfaction
69
4.8 Ordinal Regression for occupants' level of satisfaction 71
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LIST OF FIGURES
Figure Page
1.1 Vent blocks used to create the 5% unobstructed air passage 3
1.2 Flow steps of research 6
2.1 Single sided ventilation 18
2.2 Cross ventilation 18
2.3 Stack effect in buildings 19
2.4 Theoretical framework 29
3.1 Malaysia housing stock 31
3.2 General modifications to the terraced house design 32
3.3 Five terraced house design types 34
3.4 Description of the five selected house types 37
3.5 Wind rose, Kuala Lumpur Subang, Malaysia 40
3.6 Location of the selected house design types 46
3.7 Survey enumerators on site 47
4.1 Window design in the house types 51
4.2 Distribution of respondents by AC ownership 59
4.3 Distribution of respondents by AC ownership in house types 60
4.4 Distribution of respondents by AC ownership in living spaces 60
4.5 Frequency of operating AC in the living spaces 62
4.6 Distribution of respondents by opening windows in the living
spaces
63
4.7 Frequency of window opening in the living spaces 65
4.8 Reasons for opening windows 67
4.9 Reasons for not opening windows 68
5.1 Louvered windows 81
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LIST OF APPENDICES
Appendix Page
A Building design plans 99
B Description of Computer simulation and IES<VE> 104
C 3D geometry of selected house types 107
D Macroflo result output 112
E Questionnaire 115
F Letters of permission to chairman of residents association 119
G House type 5 with 5% provided unobstructed opening 121
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LIST OF ABBREVIATIONS
ACH Air Changes Rate per Hour
AC Air Conditioning
ASHRAE American Society of Heating Refrigerating and Air-
conditioning Engineers
Btu British thermal units
CFD Computational Fluid Dynamics
cfm Cubic feet metre
CO Carbon monoxide
CO2 Carbon dioxide
DOSH Department of Occupational Safety and Health Malaysia
HVAC Heating Ventilating and Air Conditioning
IAQ Indoor Air Quality
IES<VE> Integrated Environmental Solutions Virtual Environment
l/s Litres per seconds
LVAQ Limit Value for Air Quality
MCPIAQ Malaysian Industrial Code of Practice on Indoor Air
Quality
m3 Cubic metre
m3/h Cubic metre per hour
m/s Metres per seconds
NAAQS National Ambient Air Quality Standards
OR Odds Ratio
ppm Parts per million
PPV Predicted Percentage of Dissatisfied
PM Particulate Matter
PMV Predicted Mean Vote
SE Standard Error
SPSS Statistical Package for Social Sciences
TVOCs Total Volatile Organic Compounds
UBBL Uniform Building By-Law
US EIA United State Energy Information Administration
US EPA United State Environmental Protection Agency
WHO World Health Organization
3D Three Dimensional 0C Degree Celsius
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CHAPTER 1
INTRODUCTION
1.1 Background
Occupants of residential buildings in a hot-humid climatic region depend highly on
mechanical cooling technologies to achieve thermal comfort (Kubota et al., 2009).
However, numerous studies have revealed that people in hot-humid climatic regions can
accommodate high temperatures and in fact, adequate comfort can be achieved through
natural ventilation (de Dear, 2004; Feriadi and Wong, 2004; Nicol, 2004; Yang and
Zhang, 2008; Peeters et al., 2009; Cândido et al., 2010; Wei et al., 2011; Yau et al.,
2011; Nguyen et al., 2012). Although these studies were able to prove the adaptive
ability of people in hot-humid regions to high temperatures, the rate of air-conditioning
ownership and usage is still very high.
Since air-conditioners consume a lot of energy, energy consumption needs to be
controlled. Thus, in an attempt to increase energy efficiency with the use of mechanical
cooling in buildings, houses have been built to be air tight to prevent leakage of cool
draft through the building’s skin (Nielsen and Drivsholm, 2010; Lee et al., 2012). Air
tightness in buildings has limited the free passage of air in and out of the indoor
environment causing a reduction in ventilation rates (Nantka, 2006). Moreover, studies
have shown that this reduction in ventilation rates results in the deterioration of the
indoor air quality and has been reported to lead to various health related issues such as
sick building syndrome, and the occurrence of asthma and other respiratory diseases
(Guo et al., 2008; Zuraimi and Tham, 2008; Aizat et al., 2009; Fisk et al., 2009; Lee et
al., 2012). Therefore, there is a need to strike a balance between energy efficiency,
thermal comfort, and indoor air quality. Natural ventilation can be considered in this
aspect, as it has been revealed to have a good potential in delivering acceptable thermal
comfort for both tropical and temperate climates (Haase and Amato, 2009). It is also a
natural means of saving energy and an effective passive strategy to improve indoor air
quality (Hooff and Blocken, 2010; Yusoff, et al, 2010; van Hooff, et al., 2011;
Bangalee, et al., 2012; Haw, et al., 2012; Saadatian, et al., 2012).
Natural ventilation has been studied all over the world with regards to energy
conservation (Kubota and Ahmad, 2006; Yik and Lun, 2010; Prajongsan and Sharples,
2012), acceptable thermal comfort (Kubota et al., 2009; Abdullah and Wang, 2012;
Prajongsan and Sharples, 2012), and also as a means of improving indoor air quality
(Qiming et al., 2010; Sekhar and Goh, 2011; Haw et al., 2012). However, with the
prevalence of sick building syndrome, absence from work and the concern for workers’
productivity, natural ventilation studies in relation to IAQ has been centered mostly on
industries, offices, and commercial buildings. Fewer studies have been carried out on
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residential buildings, particularly in hot and humid climatic regions. Whereas, the
climatic conditions (hot-humid) and the increasing need to make the indoor
environment confortable for occupants’ health and wellbeing should have necessitated
more studies in residential buildings. Therefore, this research will focus on natural ventilation in residential buildings in the
hot-humid climate of Malaysia. Natural ventilation provisions and occupants’ behaviour
towards these provisions will be evaluated. Furthermore, natural ventilation in relation
to IAQ will be studied by evaluating the ventilation rates achieved through the present
provisions for natural ventilation in the studied residential buildings.
1.2 Problem statement
Residential building design in Malaysia, according to Said et al. (2004), neglects the
need for natural ventilation and this has led occupants to resort to alternative means (i.e.
mechanical cooling). Kubota (2006) recorded that air-conditioning (AC) usage in
Malaysian homes account for 60% and 70% in terraced and detached houses
respectively. Furthermore, Kubota and Ahmad (2005a) revealed that individual terraced
houses owned an average of 2.3 AC units, and 1.9 units per household in other housing
types (Kubota, 2006). He further predicted a higher level of AC ownership with an
increase in the annual household income of occupants. Although 80% of occupants in
residential buildings utilise window openings during the day time according to Kubota
(2006), and Kubota and Ahmad (2005b), AC usage is still prevalent in Malaysian
residential buildings. This prevalent use of AC despite occupants’ appropriate
ventilation behaviour, indicates that occupants are not satisfied with ventilating their
homes merely by opening windows.
Consequently, Malaysian residential buildings have been reported to provide window
openings that do not fulfill the Uniform Building By-law (UBBL) requirements
(Hanafiah, 2005; Ahmad et al., 2011). In Malaysia, the UBBL 1984 law 39 (1) dictates
the standard opening areas in residential buildings both for lighting and ventilation; it
stipulates that “Every room designed, adapted, or used for residential [purposes]...shall
be provided with natural lighting and ventilation by means of one or more windows,
having a total area of not less than 10% of the clear floor area of such room and shall
have openings capable of allowing a free uninterrupted passage of air not less than 5%
of such floor area.” It can be seen in Figure 1.1 that the 5% uninterrupted openings are
sometimes ignored.
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Figure 1.1. Vent blocks used to create the 5% unobstructed air passage
A: at the rear side of the building. B: at window tops. C: 5% air passage ignored
(Source: author).
In addition, studies have shown that naturally ventilated residential buildings in
Malaysia are still found to exhibit indoor climatic (temperature and humidity)
conditions and contaminant levels that are not acceptable within the recommended
range for acceptable IAQ (Ahmed et al., 2004; Muhamad-darus et al., 2011). With less
satisfaction on the part of occupant despite the fact that most of them open their
windows to ventilate their homes, there is therefore a need to investigate the natural
ventilation provisions in Malaysian residential buildings in relation to the law (UBBL)
governing them. It is also necessary to study the IAQ of these buildings in terms of the
ventilation rates delivered by these natural ventilation provisions. This study intends to
investigate the present provisions for natural ventilation in selected residential buildings
in Malaysia, and the effect of non-conformity to the natural ventilation provision
stipulated in the UBBL in terms of occupants’ responses to these provisions and the
delivered ventilation rates.
A
C
B
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1.3 Main research question:
What is the performance of natural ventilation provisions in Malaysian residential
buildings?
1.3.1 Sub research questions:
I. To what extent are natural ventilation provisions in Malaysian residential
buildings complied with the UBBL requirements?
II. What is the effectiveness of the existing natural ventilation provisions in relation
to indoor ventilation rates?
III. To what extent do occupants utilise the provided natural ventilation provisions
and what are the factors that contribute to their satisfaction with indoor
ventilation when utilizing natural ventilation?
1.4 Research Objectives
Therefore, this study aims to investigate natural ventilation provisions of residential
buildings in hot-humid climate under different terraced house design types, with the
following objectives:
I. To identify natural ventilation provisions in selected housing design types with
reference to Uniform Building By-Law (UBBL) requirements.
II. To determine the ventilation rates delivered by the natural ventilation provisions
in the selected housing design types through computer simulation.
III. To assess occupants’ utilisation of natural ventilation provisions and their level
of satisfaction by taking into account the UBBL requirements and the ventilation
rates of the building spaces.
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1.5 Significance of study
This study intends to uncover the current practice of natural ventilation in Malaysian
residential buildings and the pattern of ventilation behaviour among occupants of
different households. Consequently, the study intends to reveal the conformity of
natural ventilation provision with UBBL and its implications for occupants’ level of
satisfaction with indoor ventilation when utilizing natural ventilation in their homes.
Furthermore, the study looks into the effectiveness of these ventilation provisions by
studying their delivered ventilation rates in each house design types. Findings from this
study will inform house designers on the importance of the required law governing the
natural ventilations in residential buildings. It is also expected that the findings will
highlight the need for a strict effective enforcement of UBBL compliance for the
purpose of building approvals.
1.6 Thesis structure
This thesis is organised into five chapters. Chapter 1 is an introduction to the study. It
includes a background on natural ventilation, statement of the problem, objectives and
methodology. Chapter 2 reviews issues related to literature on natural ventilation and
indoor air quality (IAQ) to reveal the research gaps to be filled. It also reviews the
major studies that have been undertaking in the past for evaluating natural ventilation
provisions in Malaysian terraced houses. The research methodologies adopted for the
analysis are discussed in detail in chapter 3. Chapter 4 analyses and discusses the
findings from all data collection methods. Chapter 5 concludes the main findings in
accordance with the objectives of the study, and it also outlines potential future
research. The flow steps of the research are presented in figure 1.2.
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Figure 1.2. Flow steps of research
LITERATURE REVIEW:
Motivation and justification of study
Problem identification
Research gap
Hypothesis
STEP 1
Design review and observation
STEP 3
Questionnaire survey
STEP 2
Computer simulation
Sub-RQ1
Sub-RQ2
Ventilation
provisions in
accordance with
UBBL
Ventilation
rates
Occupants’
ventilation
behaviour
Occupants’
Level of
satisfaction
Conclusion Further studies
PROCEDURE OUTCOME
Sub-RQ3
Objective 1
Objective 2
Objective 3
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REFERENCE
Abdullah, A.H. and Wang, F. (2012). Design and low energy ventilation solutions for
atria in the tropics. Sustainable Cities and Society. 2(1): 8–28.
Agraz-boeneker, B.R., Groves, W.A. and Haight, J.M. (2007). An examination of
observations and incidence rates for a behavior based safety program. The Journal
of SH&E Research. 4(3): 1–22.
Ahmad, H., Fadlie, M.Y., Yahaya, N.A. and Abu, J. (2011). The means of escaping for
occupants for renovation works of terrace houses in Malaysia. Procedia
Engineering. 20: 188–192.
Ahmed, A.Z., Rahman, S.A. and Shahrani, S. CO and CO2 concentrations in naturally-
ventilated houses in Malaysia. In Plea2004. The 21st Conference on Passive and
Low Energy Architecture, Eindhoven, The Netherlands, Sept. 19-20, 2004.
Aizat, I.S., Juliana, J., Norhafizalina, O., Azman, Z.A. and Kamaruzaman, J. (2009).
Indoor air quality and sick building syndrome in Malaysian buildings. Global
Journal of Health Science. 1(2): 126–135.
Allard, F. (1998). Natural ventilation in buildings: A Design Handbook. London: James
and James (science publisher) Ltd.
Ananth, C.V. and Kleinbaum, D.G. (1997). Regression models for ordinal responses: A
review of methods and applications. International Journal of epidemiology. 26(6):
1323–1333.
Andersen, R.V., Toftum, J., Andersen, K.K. and Olesen, B.W. (2009). Survey of
occupant behaviour and control of indoor environment in Danish dwellings.
Energy and Buildings. 41(1): 11–16.
ASHRAE. (2004). Ventilation and Acceptable Indoor Air Quality in Low-rise
Residential Buildings, Standard 62.2-2004. Atlanta, GA: American Society for
Heating, Refrigerating and Air Conditioning Engineers.
ASHRAE. (2007). Ventilation for acceptable indoor air quality, Standard 62.1-2007
(Vol. 2007). Atlanta, GA: American Society for Heating, Refrigerating and Air
Conditioning Engineers.
Attia, S., Beltrán, L., De Herde, A. and Hensen, J. (2009). “ Architect Friendly ”: A
comparison of ten different building performance simulation tools. In 11th
IBPSA
© COPYRIG
HT UPM
85
Building Simulation Conference. International Building Performance Simulation
Association, Glasgow, July 27-30.
Awbi, H. B. (1991). Ventilation of buildings. London: E & FN Spon.
Aynsley, R. Low energy architecture for humid tropical climates. In Proceeding of the
World Renewable Energy Congress, Malaysia, June 8-11 June, 1999.
Baird, G. and Field, C. (2012). Thermal comfort conditions in sustainable buildings –
Results of a worldwide survey of users’ perceptions. Renewable Energy. 64: 1-4.
Balasubramanian, B., Lee, R. and Sheng, S. (2007). Characteristics of indoor aerosols in
residential homes in urban locations : A case study in Singapore. Journal of Air
Waste Management Association. 57(8): 8-10.
Baldasano, J.M., Valera, E. and Jiménez, P. (2003). Air quality data from large cities.
The Science of the total environment. 307(1-3): 141–65.
Bangalee, M.Z. I., Lin, S.Y. and Miau, J.J. (2012). Wind driven natural ventilation
through multiple windows of a building: A computational approach. Energy and
Buildings. 45: 317–325.
Barnett, V. (1991). Sample survey: Principles and methods. London: Hodder.
Bartlett, J.E., Kotrlik, J.W. and Higgins, C.C. (2001). Organizational Research :
Determining Appropriate Sample Size in Survey Research. Information
Technology, Learning, and Performance Journal. 19(1): 43–50.
Behrendt, B.M., Raimondo, D., Zhang, Y., Schwarz, S., Christensen, J.E. and Olesen,
B.W. (2011). A system for the comparison of tools for the simulation of water-
based radiant heating and cooling system. In 12th Conference of International
Building Performance Simulation Association. Proceedings of Building
Simulation, Sydney, Nov. 14-16, 2011.
Bonhomme, V., Llabres, V., Dewandre, P.Y., Brichant, J.F. and Hans, P. (2006).
Combined use of Bispectral Index and A-Line Autoregressive Index to assess anti-
nociceptive component of balanced anaesthesia during lumbar arthrodesis. British
journal of anaesthesia. 96(3): 353–60.
Bonhomme, V., Uutela, K., Hans, G., Maquoi, I., Born, J. D., Brichant, J. F., Lamy, M.
and Hans, P. (2010). Comparison of the surgical Pleth IndexTM
with
© COPYRIG
HT UPM
86
haemodynamic variables to assess nociception-anti-nociception balance during
general anaesthesia. British journal of anaesthesia. 106(1): 101–11.
Bornehag, C.G., Sundell, J., Weschler, C.J., Sigsgaard, T., Lundgren, B., Hasselgren,
M. and Hägerhed-Engman, L. (2004). The Association between Asthma and
Allergic Symptoms in Children and Phthalates in House Dust: A Nested Case-
Control Study. Environmental Health Perspectives. 112(14): 1393–1397.
Brager, G.S. and de Dear, R. Climate, Comfort and Natural Ventilation : A new
adaptive comfort standard for ASHRAE Standard 55. In Moving Thermal Comfort
Standards into the 21st Century, Oxford Brookes University, Windsor, UK, April,
2001.
Brasche, S. and Bischof, W. (2005). Daily time spent indoors in German homes -
Baseline data for the assessment of indoor exposure of German occupants.
International Journal of Hygiene and Environmental Health. 208: 247–253.
Bronsema, B., Carrer, P., Clausen, G., Fitzner, K. and Follin, T. (2004). Performance
criteria of buildings for health and comfort. (J. Säteri, Ed.). The International
Council for Research and Innovation in Building and Construction (CIB).
Chan, L., Mak, J., Low, Y., Koh, T., Ithoi, I. and Mohamed, M. S. (2011). Isolation and
characterization of Acanthamoeba spp. from air-conditioners in Kuala Lumpur,
Malaysia. Acta Tropica. 117(1): 23–30.
Charles, K. E. (2003). Fanger ’ s Thermal Comfort and Draught Models (pp. 1–29).
Ottawa, Canada.
Chenvidyakarn, T. (2007). Review article: Passive design for thermal comfort in hot
humid climates. Journal of Architectural/Planning Research and Studies. 5(1): 1–
27.
Citko, D., Milewska, A.J. and Wasilewska, J. (2012). Ordinal logistic regression for the
analysis of skin test reactivity to common aeroallergens. Studies In Logic,
Grammar and Rhetoric. 29(42): 87–98.
Creswell, J. W. (2009). Research Design: Qualitative, Quantitative, and Mixed Methods
Approaches (3rd.Ed.). Thousands Oaks, California: Sage Publication
Cândido, C., De Dear, R., Lamberts, R. and Bittencourt, L. (2010). Cooling exposure in
hot humid climates: are occupants “addicted”? Architectural Science Review.
53(1): 59–64.
© COPYRIG
HT UPM
87
Daghigh, R. (2009a). The effect of air exchange rate on human thermal comfort in an
air-conditioned office under different opening arrangements. European Journal of
Scientific Research. 25(2): 174–191.
Daghigh, R. (2009b). Thermal comfort in naturally ventilated office under varied
opening arrangements: Objective and subjective approach. European Journal of
Scientific Research. 26(2): 260–276.
De Dear, R. (2004). Thermal comfort in practice. Indoor air. 14(Suppl 7): 32–9.
De Dear, R. and Brager, G.S. (2001a). The adaptive model of thermal comfort and
energy conservation in the built environment. International journal of
biometeorology. 45(2): 100–8.
De Dear, R. and Brager, G.S. (2002). Thermal comfort in naturally ventilated buildings:
revisions to ASHRAE Standard 55. Energy and Buildings. 34(6): 549–561.
De Dear, R., Brager, G.S. and Cooper, D. (1997). Developing an Adaptive Model of
Thermal Comfort and Preference. ASHRAE RP- 884 and Macquarie Research,
Ltd.
De Vaus, D. A. (2002). Surveys in social research. (M. Bulmer, Ed.) (Fifth edit., pp. 3–
5). London: Routledge.
Dimitroulopoulou, C. (2012). Ventilation in European dwellings: A review. Building
and Environment. 47: 109–125.
DOSH. (2010). Industry Code of Practice On Indoor Air Quality. Malaysia.
Edimansyah, B.A., Rusli, B.N., Naing, L., Azwan, B.A. and Aziah, B.D. (2009). Indoor
air quality in an automotive assembly plant in Selangor , Malaysia. Southeast
Asian Journal of Trop Med Public Health. 40(1): 187–192.
Eusébio, Z., Conceição, Gomes, J.M.M., Antão, N.H. and Lúcio, M.M.J.R. (2012).
Application of a developed adaptive model in the evaluation of thermal comfort in
ventilated kindergarten occupied spaces. Building and Environment. 50: 190–201.
Evans, M. (1980). Housing, climate and comfort. London: The Architectural Press.
Fabi, V., Vinther, R., Corgnati, S. and Olesen, B.W. (2012). Occupants’ window
opening behaviour : A literature review of factors influencing occupant behaviour
and models. Building and Environment. 58: 188–198.
© COPYRIG
HT UPM
88
Fanger, P.O. (1970). Thermal comfort, analysis and application in environment
engineering. Copenhagen, Denmark: Danish Technical Press
Feriadi, H. and Wong, N.H. (2004). Thermal comfort for naturally ventilated houses in
Indonesia. Energy and Buildings. 36(7): 614–626.
Fisk, W.J., Mirer, A.G. and Mendell, M.J. (2009). Quantitative relationship of sick
building syndrome symptoms with ventilation rates. Indoor air. 19(2): 159–65.
Frontczak, M., Andersen, R.V. and Wargocki, P. (2012). Questionnaire survey on
factors influencing comfort with indoor environmental quality in Danish housing.
Building and Environment. 50: 56–64.
Fujita, Y., Matsumoto, H. and Siong, H.C. (2009). Assessment of CO2 emissions and
resource sustainability for housing construction in Malaysia. International Journal
of Low-Carbon Technologies. 4(1): 16–26.
Ganguly, I., Koebel, C.T. and Cantrell, R.A. (2010). A categorical modeling approach
to analyzing new product adoption and usage in the context of the building-
materials industry. Technological Forecasting and Social Change. 77(4): 662–677.
Gillham, B. (2008). Developing a questionnaire (Second edi., pp. 1–14). London:
Continuum International Publishing group.
Givoni, B. (1998). Climate considerations in building and urban design. New York:
Van Nostrand Reinhold.
Guo, H., Morawska, L., He, C. and Gilbert, D. (2008). Impact of ventilation scenario on
air exchange rates and on indoor particle number concentrations in an air-
conditioned classroom. Atmospheric Environment. 42(4): 757–768.
Haase, M. and Amato, A. (2009). An investigation of the potential for natural
ventilation and building orientation to achieve thermal comfort in warm and humid
climates. Solar Energy. 83(3): 389–399.
Hanafiah, M.A. (2005). The effectiveness of natural ventilation design in low cost
housing. Master thesis, Universiti Teknologi Malaysia.
Harada, K., Hasegawa, A., Wei, C., Minamoto, K., Noguchi, Y., Hara, K., Matsushita,
O., Noda, K. and Ueda, A. (2010). A Review of Indoor Air Pollution and Health
Problems from the Viewpoint of Environmental Hygiene : Focusing on the Studies
© COPYRIG
HT UPM
89
of Indoor Air Environment in Japan Compared to Those of Foreign Countries.
Journal of Health Science. 56(5): 488–501.
Hassan, A.S. (2006). Towards Sustainable Housing Construction in Southeast Asia,
Agenda 21 for Sustainable Construction in Developing Countries Asia Position
Paper (pp. 1–17).
Hassan, A.S. and Ramli M. (2010). Natural ventilation of indoor air temperature : A
case study of the traditional malay house in Penang. American J. of Engineering
and Applied Science. 3(3): 521–528.
Haw, L.C., Saadatian, O., Sulaiman, M.Y., Mat, S. and Sopian, K. (2012). Empirical
study of a wind-induced natural ventilation tower under hot and humid climatic
conditions. Energy and Buildings. 52: 28–38.
Heiselberg, P. (2008). Characteristic of natural and hybrid ventilation systems. In H. B.
Awbi. Ventilation systems: Design and performance (pp. 345–398). London and
New York: Taylor & Francis.
Hensen, J.L.M. (1990). Literature review on thermal comfort in transient conditions.
Building and Environment. 25(4): 309–316.
Ho Chin, S. (2006). Putrajaya – Administrative Centre of Malaysia -Planning Concept
and Implementation. In Sustainable urban development and Governance
conference, Seoul, Korea, Nov. 16, 2006.
Horan, J.M. and Finn, D.P. (2008). Sensitivity of air change rates in a naturally
ventilated atrium space subject to variations in external wind speed and direction.
Energy and Buildings. 40(8): 1577–1585.
Huang, L., Ouyang, Q., Zhu, Y. and Jiang, L. (2013). A study about the demand for air
movement in warm environment. Building and Environment. 61: 27–33.
Hussein, I. and Rahman, H.M. (2009). Field Study on Thermal Comfort in Malaysia.
European Journal of Scientific Research. 37(1): 127–145.
Indraganti, M. (2010). Adaptive use of natural ventilation for thermal comfort in Indian
apartments. Building and Environment. 45(6): 1490–1507.
Integrated Environmental solution IES<VE> software. Integrated Environmental
Solutions Limited 2012.
© COPYRIG
HT UPM
90
Isa, M.C. and Yunus, Z. (2010). An evaluation of indoor air quality in a machinery
room of a floating vessel. Journal of Defence and Security. 1(2): 258–274.
Ismail, A.R., Jusoh, N., Zulkifli, R., Sopian, K. and Deros, B.M. (2009). Thermal
comfort assessment: A case study at Malaysian automotive industry. American
Journal of Applied Sciences. 6(8): 1495–1501.
Janssen, J.E. and Hill, T.J. (1982). Ventilation for control of indoor air quality: A case
study. Environment International. 8: 487–496.
Janssen, J.E. (1989). The history of ventilation and temperature control. ASHRAE
Journal. 47–52.
Jo, W.J. and Sohn, J.Y. (2009). The effect of environmental and structural factors on
indoor air quality of apartments in Korea. Building and Environment. 44(9): 1794–
1802.
Johnson, B. and Christensen, L. (2008). Educational Research: Qualitative,
Quantitative, and Mixed Methods (3rd edition). Thousands Oaks, California: Sage
Publication
Jones, A.P. (1999). Indoor air quality and health. Atmospheric Environment. 33(28):
4535–4564.
Karam, M.A, Mazran, I. and Rahman, A.M.A. (2014). A comparative study between
unvented and vented attics powered by the hybrid turbine ventilator in Malaysian
houses. International Journal of Sustainable Energy. DOI:
10.1080/14786451.2013.873801.
Khalaf, A., Ekblom, Ö., Kowalski, J., Berggren, V., Westergren, A. and Al-Hazzaa, H.
(2013). Female university students’ physical activity levels and associated factors--
a cross-sectional study in southwestern Saudi Arabia. International journal of
environmental research and public health. 10(8): 3502–17.
Khan, N., Su, Y. and Riffat, S.B. (2008). A review on wind driven ventilation
techniques. Energy and Buildings. 40: 1586–1604.
Kleiven, T. (2003). Natural ventilation in buildings. Ph.D thesis, Norwegian University
of Science and Technology.
Košak, M. and Poljšak, J. (2010). Loss given default determinants in a commercial bank
lending : an emerging market case study. Original scientific paper. 28(1): 61–88.
© COPYRIG
HT UPM
91
Kubba, S. (2010). Indoor Environmental Quality. LEED Practices, Certification, and
Accreditation Handbook (pp. 211–269). Butterworth-Heinemann.
Kubota, T. Usage of air-conditioners and windows in residential areas in johor bahru
city: planning methods of coastal residential areas in consideration of wind flow.
The 7th International Seminar on Sustainable Environment & Architecture,
Makassar, Indonesia, Nov. 20-21, 2006.
Kubota, T. and Ahmad, S. Energy efficient city in Malaysia. The 6th International
Seminar on Sustainable Environment Architecture (SENVAR), Bandung,
Indonesia, Sep. 2005a.
Kubota, T. and Ahmad, S. Questionnaire Survey on Behavior for Natural Ventilation
and Electricity Consumption in Terraced Houses : A case study of Johor Bahru
City. In Asian Planning Schools Association (APSA) Conference 2005, Peneng,
Malaysia, Sep. 11-14, 2005b.
Kubota, T. and Ahmad, S. (2006). Wind Environment Evaluation of Neighborhood
Areas in Major Towns of Malaysia. Journal of Asian Architecture and Building
Engineering. 5(1): 199–206.
Kubota, T., Chyee, D.T.H. and Ahmad, S. (2009). The effects of night ventilation
technique on indoor thermal environment for residential buildings in hot-humid
climate of Malaysia. Energy and Buildings. 41(8): 829–839.
Lai, S.C., Ho, K., Zhang, Y., Lee, S., Huang, Y. and Zou, S. (2010). Characteristics of
Residential Indoor Carbonaceous Aerosols: A Case Study in Guangzhou, Pearl
River Delta Region. Aerosol and Air Quality Research. 10: 472–478.
Laws of Malaysia (2008), Uniform Building By-Laws, Act 133 (15th ed,), MDC
Publishers Sdn Bhd, Kuala Lumpur.
Lee, H., Lee, Y.J., Park, S.Y., Kim, Y.W. and Lee, Y. (2012). The Improvement of
Ventilation Behaviours in Kitchens of Residential Buildings. Indoor and Built
Environment. 21(1): 48–61.
Lee, S. and Chan, L. (1998). Indoor/outdoor air quality correlation and questionnaire
survey at two staff quarters in hong kong. Environmental International. 24(7):
729–737.
Leng, P.C., Ahmad, M.H., Ossen, D.R. and Hamid, M. Investigation of integrated
environmental solutions-virtual environment software accuracy for air
© COPYRIG
HT UPM
92
temperature and relative humidity of the test room simulations. UMT 11th
International Annual Symposium on Sustainability Science and Management,
Terengganu, Malaysia, July 9-11, 2012.
Li, R., Pitts, A. and Li, Y. Buoyancy-driven natural ventilation of a room with large
openings. Proceedings: Building Simulation, 2007.
Lodhi, M.A. and Zain-al-Abdin, A. (1999). Indoor air pollutants produced from fossil
fuel and biomass. Energy Conversion and Management. 40(3): 243–248.
Marr, D., Mason, M., Mosley, R. and Liu, X. (2012). The influence of opening
windows and doors on the natural ventilation rate of a residential building. HVAC
& R Research. 18(1-2): 195–203.
Ministry of education. (2007). Designing quality learning spaces : Ventilation & Indoor
Air Quality (pp. 9–10). New Zealand: Branz limited.
Moediartianto, B. (2006). Natural ventilation performance of multi-storey low income
housings in a hot humid climate: Assessment of thermal comfort and indoor air
quality, a study in Semarang, Central Java-Indonesia. Master thesis, University of
Applied Sciences Cologne, Institute of Technologies in the Tropics.
Mohamed, M.F, Prasad, D. and Tahir, M.M. A Study on balcony and its potential as an
element of ventilation control in naturally ventilated apartment in hot and humid
climate. International Conference on Construction and Building Technology,
2008.
Mohamed, M.F. (2011). The Potential of Balconies to Induce Wind-Driven Natural
Ventilation in Single- sided Ventilated High-Rise Apartments. Ph.D thesis, The
University of the New South Wales, Australia.
Mohammadi, A.R., Tahir, M.M., Usman, I.M.S., Surat, M. and Ismail, A.H. (2010).
The effect of balcony to enhance the natural ventilation of terrace houses in the
tropical climate of Malaysia. The Journal of Design + Built. 3: 105–113.
Mohit MA, Ibrahim M, Rashid YR. (2010). Assessment of residential satisfaction in
newly designed public low-cost housing in Kuala Lumpur, Malaysia. Habitat
International. 34(1): 18–27.
Molloy, S.B., Cheng, M., Galbally, I.E., Keywood, M.D., Lawson, S.J., Powell, J.C.,
Gillett, R., Dunne, E. and Selleck, P.W. (2012). Indoor air quality in typical
temperate zone Australian dwellings. Atmospheric Environment. 54(2): 400–407.
© COPYRIG
HT UPM
93
Muhamad-darus, F., Zain-ahmed, A. and Talib, M. (2011). Assessment of indoor air
quality in terrace houses. Health and the Environment Journal. 2(2): 8–14.
Nantka, M. B. (2006). Indoor Conditions in Silesian Buildings with Natural Ventilation.
Indoor and Built Environment. 15(6): 571–582.
Nguyen, A.T., Singh, M.K. and Reiter, S. (2012). An adaptive thermal comfort model
for hot humid South-East Asia. Building and Environment. 56: 291–300.
Ni, J.Q., Robarge, W.P., Xiao, C. and Heber, A.J. (2012). Volatile organic compounds
at swine facilities: A critical review. Chemosphere. 89(7): 769–788.
Nicol, F. (2004). Adaptive thermal comfort standards in the hot–humid tropics. Energy
and Buildings. 36(7): 628–637.
Nicol, J. and Humphreys, M. (2004). A stochastic approach to thermal comfort –
occupant behaviour and energy use in buildings. ASHRAE Transactions. 110(2):
554–68.
Nicol, J.F. and Humphreys, M.A. (2002). Adaptive thermal comfort and sustainable
thermal standards for buildings. Energy and Buildings. 34: 563–572.
Nielsen, T.R. and Drivsholm, C. (2010). Energy efficient demand controlled ventilation
in single family houses. Energy and Buildings. 42(11): 1995–1998.
Nugroho, A.M. and Ahmad, M.H. Possibility to use solar induced ventilation strategies
in tropical conditions by computational fluid dynamic simulation. Paper presented
at 6th Sustainable Environmental Architecture, at Institut Teknologi Bandung,
Bandung, Indonesia, September 2005.
Nugroho, A.M., Ahmad, M.H. and Ossen, D.R. (2007). A preliminary study of thermal
comfort in malaysia′s single storey terraced houses. Journal of Asian Architecture
and Building Engineering. 6(1): 175–182.
Olesen, B., Bluyssen, P. and Roulet, C.A. (2008). Ventilation and indoor environmental
quality. In H. B. Awbi (Ed.), Ventilation systems: Design and performance (First
edit., pp. 62–99). London and New York: Taylor & Francis.
Ombui, G.M., Geofrey, M. and Gichuhi, A.W. (2011). Using ordinal regression
modeling to evaluate the satisfaction of jomo Kenyatta University of Agriculture
and Technology faculty of science students. JAGST. 13(1): 164–176.
© COPYRIG
HT UPM
94
Peeters, L., De Dear, R., Hensen, J. and D’haeseleer, W. (2009). Thermal comfort in
residential buildings: Comfort values and scales for building energy simulation.
Applied Energy. 86(5): 772–780.
Prajongsan, P. and Sharples, S. (2012). Enhancing natural ventilation, thermal comfort
and energy savings in high-rise residential buildings in Bangkok through the use of
ventilation shafts. Building and Environment. 50: 104–113.
Qian, H., Li, Y., Seto, W.H., Ching, P., Ching, W.H. and Sun, H.Q. (2010). Natural
ventilation for reducing airborne infection in hospitals. Building and Environment.
45(3): 559–565.
Qiming, L., Changhong, W. and Lin, S. Multi-zone particle model: The effect of
ventilation on indoor concentration. In 12(Iccasm). International Conference on
Computer Application and System Modeling (ICCASM 2010), 2010.
Rahman, A.M.A, Norazmawati M.A., Al-Obaidi, K.M., Mazran, I. and Lim, Y.M.
(2013). Rethinking the Malaysian affordable housing design typology in view of
global warming considerations. Journal of Sustainable Development. 6(7): 134-
146.
Raja, I.A, Nicol, J.F., McCartney, K.J. and Humphreys, M.A. (2001). Thermal comfort:
use of controls in naturally ventilated buildings. Energy and Buildings. 33(3): 235–
244.
Rajasekar, A. and Balasubramanian, R. (2011). Assessment of airborne bacteria and
fungi in food courts. Building and Environment. 46(10): 2081–2087.
Rajeh, M. (1989). Natural ventilation in terrace housing of Malaysia: Effect of air well
on air flow and air velocity. Master thesis, University of Queensland.
Rijal, H.B., Tuohy, P., Humphreys, M.A., Nicol, J.F., Samuel, A. and Clarke, J. (2007).
Using results from field surveys to predict the effect of open windows on thermal
comfort and energy use in buildings. Energy and Buildings. 39: 823–836.
Roulet, C.A. (2008). Characteristic of mechanical ventilation systems. In H.B. Awbi
(Ed.), Ventilation systems: Design and performance (First edit., pp. 300–344).
London and New York: Taylor & Francis.
Saadatian, O., Haw, L.C., Sopian, K. and Sulaiman, M.Y. (2012). Review of
windcatcher technologies. Renewable and Sustainable Energy Reviews. 16(3):
1477–1495.
© COPYRIG
HT UPM
95
Sadafi, N., Salleh, E., Lim, C.H. and Jaafar, Z. (2008). Potential thermal impacts of
internal courtyard in terrace houses: A case study in tropical climate. Journal of
Applied Sciences. 8(15): 2770–2775.
Sadrzadehrafiei, S., Mat, K.S.S. and Lim, C.H. (2011). Determining the cost saving and
emission reduction of optimum insulation thickness and air gap for building walls.
Australian Journal of Basic and Applied Sciences. 5(12): 2287–2294.
Saha, S., Guha, A. and Roy, S. (2012). Experimental and computational investigation of
indoor air quality inside several community kitchens in a large campus. Building
and Environment. 52: 177–190.
Said, I., Nafida, R., Shahminan, R., Salleh, R. and Bahru, J. (2004). Reintroduction of
Ventilation Components for Terrace Houses in Malaysia. Department of
Architecture, Faculty of Built Environment Universiti Teknologi Malaysia,.
Saji, N.B. (2012). A review of malaysian terraced house design and the tendency of
changing. Journal of Sustainable Development. 5(5): 140–149.
Sapian, A.R. (2004). Possibilities of using void to improve natural cross ventilation in
high-rise low-cost residential building. Ph.D thesis, Universiti Teknologi
Malaysia.
Sekhar, S.C. and Goh, S.E. (2011). Thermal comfort and IAQ characteristics of
naturally/mechanically ventilated and air-conditioned bedrooms in a hot and humid
climate. Building and Environment. 46(10): 1905–1916.
SeoRyungJu, and Omar, S.B. (2011). A typology of modern housing in malaysia. 1st
South East Asia Housing Forum of ARCH, Seoul, Korea, 1–12.
Sherman, M. and Levin, H. (1996). Renewables in ventilation and indoor air quality.
WREC, 236–240.
Siew, C.C., Che-Ani, A.I., Tawil, N.M., Abdullah, N.A.G. and Mohd-Tahir, M. (2011).
Classification of Natural Ventilation Strategies in Optimizing Energy Consumption
in Malaysian Office Buildings. Procedia Engineering. 20: 363–371.
Slezakova, K., Pires, J.C.M., Martins, F.G., Pereira, M.C. and Alvim-Ferraz, M.C.
(2011). Identification of tobacco smoke components in indoor breathable particles
by SEM–EDS. Atmospheric Environment. 45(4): 863–872.
© COPYRIG
HT UPM
96
Straaten, J.F.V. (1967). Thermal performance of buildings. Amsterdam: Elsevier
Publishing Company.
Strand, S. (2012). The White British – Black Caribbean achievement gap : tests, tiers
and teacher expectations. British Educational Research Journal. 38(1): 75–101.
Strand, S., Cadwallader, S. and Firth, D. Using statistical regression models in
Education research, Economic and Social Science Research Council.
http://www.restore.ac.uk/srme/www/fac/soc/wie/research-
new/srme/modules/mod5/index.html (accessed 2 Aug. 2012).
Sulaiman, N., Abdullah, M. and Chieu, P.L.P. (2005). Concentration and Composition
Of PM10 in Outdoor and Indoor Air in Industrial Area of Balakong Selangor ,
Malaysia. Sains Malaysiana. 34(2): 43–47.
Sulaiman, Z. and Mohamed, M. (2011). Indoor Air Quality and Sick Building
Syndrome Study at two Selected Libraries in Johor Bahru, Malaysia. Environment
Asia. 4(1): 67–74.
Sumita, J. (2009). Malaysia’s terraced housing: Towards an environmentally
sustainable future. Master thesis, Deakin University.
Sundell, J. (2004). On the history of indoor air quality and health. Indoor air. 14 Suppl
7(Suppl 7): 51–8.
Tahir, M.M., Chee-Ani, A., Abdullah, N.A.G., Tawil, N.M., Surat, M. and Ramly, A.
(2010). The Concept of Raised Floor Innovation for Terrace Housing in Tropical
Climate. Journal of Surveying, Construction & Property. 1(1): 47–64.
Talib, R. (2011). Post-Occupancy Evaluation on the Selected Government’s Double
Storey Terrace Housing Units in Putrajaya , Malaysia. Asian Culture and History.
3(1): 125–137.
Tantasavasdi, C., Srebric, J. and Chen, Q. (2001). Natural ventilation design for houses
in Thailand. Energy and Buildings. 33(8): 815–824.
Teck-Hong T. (2012). Housing satisfaction in medium- and high-cost housing: The case
of Greater Kuala Lumpur, Malaysia. Habitat International. 36(1): 108–116.
Tzeng, H.-M. (2002). The influence of nurses’ working motivation and job satisfaction
on intention to quit: An empirical investigation in Taiwan. International journal of
nursing studies. 39(8): 867–78.
© COPYRIG
HT UPM
97
van Hooff, T. and Blocken, B. (2010). On the effect of wind direction and urban
surroundings on natural ventilation of a large semi-enclosed stadium. Computers &
Fluids. 39(7): 1146–1155.
Van Hooff, T., Blocken, B., Aanen, L. and Bronsema, B. (2011). A venturi-shaped roof
for wind-induced natural ventilation of buildings: Wind tunnel and CFD evaluation
of different design configurations. Building and Environment. 46(9): 1797–1807.
Webb, C.G. (1959). An analysis of some observations of thermal comfort in an
equatorial climate. British journal of industrial medicine. 16: 297–310.
Wei, S., Sun, Y., Li, M., Lin, W., Zhao, D., Shi, Y. and Yang, H. (2011). Indoor
thermal environment evaluations and parametric analyses in naturally ventilated
buildings in dry season using a field survey and PMVe-PPDe model. Building and
Environment. 46(6): 1275–1283.
WHO. (2010). WHO guidelines for indoor air quality: Selected pollutants. Denmark:
DK-2100 Copenhagen Ø,.
Won, D.Y., Aubin, D., Fugler, D., Gauvin, D., L ajoie, P. and Schleibinger, H. (2011).
Comparison of air exchange rates measured with different methods and influencing
factors: preliminary results of a field study involving asthmatic children. 12th
International Conference on Indoor Air Quality and Climate, Austin, Texas,, 1–6.
Wong, N H, & Loke, A. (2001). A study of natural ventilation of public housing in
singapore using computational fluid dynamics ( cfd ) simulations. International
Journal on Architectural Science. 2(2): 35–45.
Wong, N.H. and Huang, B. (2004). Comparative study of the indoor air quality of
naturally ventilated and air-conditioned bedrooms of residential buildings in
Singapore. Building and Environment. 39(9): 1115–1123.
Wong, S.K., Wai-Chung Lai, L., Ho, D.C.W., Chau, K.W., Lo-Kuen Lam, C. and
Hung-Fai Ng, C. (2009). Sick building syndrome and perceived indoor
environmental quality: A survey of apartment buildings in Hong Kong. Habitat
International. 33(4): 463–471.
Yamamoto, N., Shendell, D.G., Winer, A.M. and Zhang, J. (2010). Residential air
exchange rates in three major US metropolitan areas: Results from the relationship
among indoor, outdoor, and personal air study 1999-2001. Indoor air. 20(1): 85–
90.
© COPYRIG
HT UPM
98
Yang, W. and Zhang, G. (2008). Thermal comfort in naturally ventilated and air-
conditioned buildings in humid subtropical climate zone in China. International
journal of biometeorology. 52(5): 385–98.
Yau, Y.H., Chew, B.T. and Saifullah, A.Z.A. (2011). A field study on thermal comfort
of occupants and acceptable neutral temperature at the national museum in
Malaysia. Indoor and Built Environment. 1–12.
Yik, F.W.H. and Lun, Y.F. (2010). Energy saving by utilizing natural ventilation in
public housing in Hong Kong. Indoor and Built Environment. 19(1): 73–87.
Yusoff, W.F.M., Salleh, E., Adam, N.M., Sapian, A.R. and Yusof Sulaiman, M. (2010).
Enhancement of stack ventilation in hot and humid climate using a combination of
roof solar collector and vertical stack. Building and Environment. 45(10): 2296–
2308.
Zain, Z.M., Taib, M.N. and Baki, S.M.S. (2007). Hot and humid climate: prospect for
thermal comfort in residential building. Desalination. 209(1-3): 261–268.
Zhang, Y. and Barrett, P. (2012). Factors influencing the occupants’ window opening
behaviour in a naturally ventilated office building. Building and Environment. 50,
125–134.
Zuraimi, M.S. and Tham, K.W. (2008). Indoor air quality and its determinants in
tropical child care centers. Atmospheric Environment. 42(9): 2225–2239.