how iaq affects you
TRANSCRIPT
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Passive
Measures
IAQ Workshop20thAugust 2013, Johor Bahru
INDOOR AIR:THE SILENT KILLER
http://www.nipponpaint.com.my/ -
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1. IEQ & IAQ; Context
2. IEQ & GBI CONTEXT
3. NATURALVENTILATION
4. IAQ TOXICITY
5. MOULDPREVENTION
Content2
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Indoor Environmental Quality4
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Visual
Comfort
IEQ and GBI Context5
RESIDENTIALNEWCONSTRUCTIONVERSION3
Visual Comfort
EE4 Lighting & Control 2 point
Maintain overall luminance not more
than specified in MS1525
EQ4 Day Lighting 3 points> 50%/75% habitable rooms daylit
EQ5 External Views 1 point
All habitable rooms to have direct views.
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IEQ and GBI Context7
RESIDENTIALNEWCONSTRUCTIONVERSION3
Thermal Comfort
EQ1
Min. IAQ Performance3 pointsAdequate fresh air to maintain thermal
comfort and air quality.
ThermalComfort
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Environ-mentalToxicity
OdourQuality
IEQ and GBI Context8
RESIDENTIALNEWCONSTRUCTIONVERSION3
Odour Quality
EQ1 Min. IAQ Performance3 points
Adequate fresh air to maintain air quality.
EQ2 VoC Minimisation 2 points
Reduce VoC to reduce odour
EQ3 Formaldehyde Minimisation 1 point
Reduce Formaldehyde to reduce odour
Environmental Toxicity
Indoor Air Quality
Indoor AirQuality
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Natural Ventilation & IAQ9 Passive design measure
Low cost alternative to low building energy
Natural means to maintain air quality
Vents build-up of toxic gases and
indoor pollutants (principally
pathogens)
Low cost/ natural means of
maintaining indoor thermal
comfort.
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Natural Ventilation & IAQ11
ASHRAE Standard 62.1-2007, Ventilation for
Acceptable Indoor Air Quality, minimumventilation rates and indoor air quality acceptable
for human occupants of a building Considers
chemical, physical, and biological contaminants.
Table 6-1 Minimum Ventilation Rates in Breathing ZoneFlow rate per person or per unit area (ASHRAE 62.1 -2007) e.g.
Office space 5 cfm/person
Mall & supermarket 7.5 cfm/person
Restaurant & Caf 7.5 cfm/person
Lecture hall 7.5 cfm/person
Games arcade / Casino 7.5 cfm/personComputer & Science Lab 10 cfm/person
Disco & Aerobics room 20 cfm/person
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Natural Ventilation & IAQ13
Outdoor Air-Ventilation Rates should comply with Third
Schedule (By Law 41) Article 12 (1) of Uniform Building By
Laws, 1984 ( UBBL )
MS 1525:2007 - Section 8.1.4 Ventilation
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Natural Ventilation & IAQ14
BUILDING TYPE MINIMUM FRESH AIR
VENTILATION cubic meter/min
RESIDENTIAL
COMMERCIAL
OFFICES
SCHOOL CLASSROOM
HOSPITAL WARDS
0.14/occupant
(0.23 lit/sec/m2 floor area
average)
CONFERENCE ROOMS 0.28/occupant
FACTORIES 0.21/occupant
Basement car Park (Mech) 6 air change/hour
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Natural Ventilation & IAQ15Bylaw 39(1)
Every room designed for residential, business or other purposesexcept hospitals & schools shall be provided with natural
lighting and natural ventilation by means of one or more
windows having total area not less than 10% of the floor area
and shall have opening for uninterrupted air passage of 5%
Bylaw 39(2)Hospitals window area 15% and open able windows 10%
Schools window area 20% and open able windows 10%
Ventilation, whether mechanical or natural, may be used for:
AIR QUALITY CONTROL: to control building air quality, by diluting internally-generated air
contaminants with cleaner outdoor air,
DIRECTADVECTIVECOOLING: to directly cool building interiors by replacing or diluting warm indoor
air with cooler outdoor air when conditions are favorable,
DIRECT PERSONAL COOLING: to directly cool building occupants by directing cool outdoor air over
building occupants at sufficient velocity to enhance convective transport of heat and moisture
from the occupants, and
INDIRECT NIGHT COOLING: to indirectly cool building interiors by pre-cooling thermally massive
components of the building fabric or a thermal storage system with cool nightime outdoor air.
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Natural Ventilation & IAQ16
Outdoor air required (L/s,m2 of floor area)
0 2 4 6 8 10
AirFlowwindowa
rea/Floo
rArea(x100%) 100
0
20
40
60
80
If by-law 39 is complied, air change requirement will comply
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Natural Ventilation & IAQ17
Global Cross Ventilation
Global Stack Ventilation
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Natural Ventilation & IAQ18
Local Single Sided Ventilation
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Natural Ventilation & Cooling21
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Natural Ventilation & Cooling22
CROSS VENTILATION COOLING ESTIMATES
DOUBLE STOREY TERRACE HOUSE 6M X 10M
COMPONENT DAY NITE
HEAT(w/m2) HEAT(w/m2)
Internal heat gains 12 12
Roof heat gains 25 0
Front & Back Elev heat gains 30 0
Total Heat Gains 67 12
Vent Cooling
Wind 2.5 & 0.5 m/s Opening 5% 80 20
Effective Vent cooling 13 8
Wind 2.5 & 0.5 m/s Opening 7% 110 30
Effective Vent cooling 43 18
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Natural Ventilation & Cooling23
Cross Ventilation
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Natural Ventilation & Cooling24
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Natural Ventilation & Cooling25
COMPONENT DAY NITE
HEAT(w/m2) HEAT(w/m2)
Internal heat gains 12 12
Roof heat gains 25 0
Front & Back Elev heat gains 30 0
Total Heat Gains 67 12
Vent Cooling
Wind 2.5 & 0.5 m/s Opening 5% 80 20
Stack 3m Opening 5% 30 30
Combined Vent Cooling 110 65
Effective Vent cooling 43 53
Wind 2.5 & 0.5 m/s Opening 7% 110 30
Stack 5m Opening 7% 45 45
Combined Vent Cooling 125 80
Effective Vent cooling 43 18
Cross & Stack Ventilation
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Natural Ventilation & Cooling26STACK VENTILATION
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Natural Ventilation & Cooling28CROSS & STACK VENTILATION
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Indoor Air Quality Chemicals31
Indoor AirQuality
Environ-mentalToxicity
OdourQuality
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Indoor Air Quality Pathogens32
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Indoor Air Quality33
Odour Quality
EQ1 Min. IAQ Performance3 pointsAdequate fresh air to maintain air quality.
EQ2 VoC Minimisation 2 points
Reduce VoC to reduce odour
EQ3 Formaldehyde Minimisation 1 point
Reduce Formaldehyde to reduce odour
Environmental ToxicityIndoor Air Quality
Indoor AirQuality
Environ-mentalToxicity
OdourQuality
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EQ1 MIN. IAQ PERFORMANCE34
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EQ1 MIN. IAQ PERFORMANCE35
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EQ2 MIN. IAQ PERFORMANCE36
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EQ2 MIN. IAQ PERFORMANCE37
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EQ2 MIN. IAQ PERFORMANCE38
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EQ2 MIN. IAQ PERFORMANCE39
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EQ2 MIN. IAQ PERFORMANCE40
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EQ3 Formaldehyde Minimisation41
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NRNC, EQ5 Mould Prevention42
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NRNC, EQ5 Mould Prevention44
Mould is a major cause of IAQ issues in the tropics. Whilst RNC
may not have recommendations on mould prevention, it is good
design practice to prevent moulds during design & construction
stage.
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NRNC, EQ5 Mould Prevention45
Typical waterproofing details
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NRNC, EQ5 Mould Prevention47
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NRNC, EQ5 Mould Prevention48
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NRNC, EQ5 Mould Prevention49Typical waterproofing details
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NRNC, EQ5 Mould Prevention50
Typical waterproofing details
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NRNC, EQ5 Mould Prevention52
No proper water seal for
sanitary pipes throughconcrete slab.
Floor trap without proper
joint and seal.
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NRNC, EQ5 Mould Prevention53
Rising damp atskirting level of last
unit (near river
where water table is
high). No properwater proofing
detailings.
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CELEBRATING 50 MILLION SQ FT CERTIFIED GBI
S P A C E I N M A R C H 2 0 1 3
INDOOR AIR:
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Passive
Measures
IAQ Workshop20thAugust 2013, Johor Bahru
INDOOR AIR:THE SILENT KILLER
Ir Looi Hip Peu
President
Malaysia Green Building
C o n f e d e r a t i o n
www m bc or my
http://www.nipponpaint.com.my/