on average, adults spend more than
TRANSCRIPT
1 1
• On average, adults spend more than
90% indoors;
• Better IEQ protect our health,
contribute to our comfort, improve
productivity, increase profitability and
value of property, and attract & retain
more tenants;
• Poor IEQ may lead to discomfort and
illness, more sick leave and higher
absenteeism, and weaken our
competitiveness;
Why IEQ is important?
• 4 basic factors:
• Visual comfort
• Aural comfort
• Indoor Air Quality
• Thermal comfort
Indoor Environmental Quality
• Distinguish between discomfort vs. health hazard
Discomfort (examples) Health Hazard
Thermal Warm / cool sensation Heat stress, Cold stress
IAQ Odour Inhalation of toxic gases
Visual Glare, Eye strains Retina damages due to blue-
light hazard: Excessive
illumination with blue light or
UV radiation
Aural Noise annoyance Hearing damages
Normally, IEQ problem in built environment would not lead to
hazardous level, although sick symptoms may be reported.
Indoor Environmental Quality
Category Weighting (%)
Existing Building New Building
Site Aspects (SA) 18 25
Materials Aspects (MA) 12 8
Energy Use (EU) 30 35
Water Use (WU) 15 12
Innovations and Additions (IA) Bonus Bonus
Note: No Amendments have been made on the category weighting for the BEAM Plus NB and EB v1.2
Indoor Environmental Quality (IEQ) 25 20
Category Weighting
IEQ NB EB
No. of Prerequisites 1 1
No. of Credits 32 30
No. of Bonus 3 3
Credit Summary for NB:
IEQ P1 Minimum Ventilation Performance
IEQ 1 Security
IEQ 2 Plumbing and Drainage
IEQ 3 Biological Contamination
IEQ 4 Waste Disposal Facilities
IEQ 5 Construction IAQ Management
IEQ 6 Outdoor Sources of Air Pollution
IEQ 7 Indoor Sources of Air Pollution
IEQ 8 IAQ in Car Parks
IEQ 9 Increased Ventilation
IEQ 10 Background Ventilation
IEQ 11 Localized Ventilation
IEQ 12 Ventilation in Common Areas
IEQ 13 Thermal Comfort in Air-conditioned
Premises
IEQ 14 Thermal Comfort in Naturally
Ventilated Premises
IEQ 15 Natural Lighting
IEQ 16 Interior Lighting in Normally Occupied
Areas
IEQ 17 Interior Lighting in Areas Not
Normally Occupied
IEQ 18 Room Acoustics
IEQ 19 Noise Isolation
IEQ 20 Background Noise
IEQ 21 Indoor Vibration
IEQ 22 Access for Persons with Disability
IEQ 23 Amenity Features
Indoor Environmental Quality
NB Credits
IEQ NB EB
No. of Prerequisites 1 1
No. of Credits 32 30
No. of Bonus 3 3
Credit Summary for EB:
IEQ P1 Minimum Ventilation Performance
IEQ 1 Security
IEQ 2 Plumbing and Drainage
IEQ 3 Biological Contamination
IEQ 4 Waste Disposal Facilities
IEQ 5 Integrated Pest Management
IEQ 6 Construction IAQ Management
IEQ 7 Outdoor Sources of Air Pollution
IEQ 8 Indoor Sources of Air Pollution
IEQ 9 IAQ in Car Parks
IEQ 10 Increased Ventilation
IEQ 11 Background Ventilation
IEQ 12 Localized Ventilation
IEQ 13 Ventilation in Common Areas
IEQ 14 Thermal Comfort in Air-conditioned
Premises
IEQ 15 Thermal Comfort in Naturally
Ventilated Premises
IEQ 16 Natural Lighting
IEQ 17 Interior Lighting in Normally Occupied
Areas
IEQ 18 Interior Lighting in Areas Not
Normally Occupied
IEQ 19 Room Acoustics
IEQ 20 Noise Isolation
IEQ 21 Background Noise
IEQ 22 Access for Persons with Disability
IEQ 23 Amenity Features
Indoor Environmental Quality
EB Credits
IEQ P1 Minimum Ventilation Performance - Prerequisite
Exclusion:
Residential and similar buildings without central air conditioning.
Objective:
Ensure that a minimum quality and quantity of outdoor air is supplied to spaces
in the project in order to support the well-being and comfort of occupants.
Requirement:
Demonstrate that the project is in compliance with the minimum requirements of ASHRAE 62.1-
2007 in respect of Outdoor Air Quality; and Minimum Ventilation Rate.
Remark:
Indoor Environmental Quality
IEQ P1 Minimum Ventilation Performance
Indoor Environmental Quality
IEQ P1 Minimum Ventilation Performance
Indoor Environmental Quality
IEQ P1 Minimum Ventilation Performance
Indoor Environmental Quality
IEQ P1 Minimum Ventilation Performance
Good
Submission
Flow Rate Calculation based on MVAC Drawing & Spec
compared to ASHRAE 62.1-2007
Indoor Environmental Quality
IEQ P1 Minimum Ventilation Performance
Points to note:
This prerequisite is only applicable to normally occupied area.
Which of the following is a normally occupied area?
a.) Corridor?
b.) Office?
c.) Shopping mall?
d.) Serviced apartment with centralised a/c?
e.) School with split-type units?
IEQ 1 Security – 1 Credit
Exclusion:
None
Objective:
Engender a feeling of well-being amongst
building users.
Requirement:
1 credit for scoring at least 75% of the applicable security
measures and facilities for the building.
Remark:
Nil.
Indoor Environmental Quality
IEQ 1 Security
Indoor Environmental Quality
IEQ 1 Security
Good Submission
shall include points
& % achieved.
Good Submission
shall include
reference to drawing
or specification.
Good
Submission
Drawings with items highlighted +
Photographs + Checklist
Indoor Environmental Quality
IEQ 1 Security
IEQ 2 Plumbing and Drainage – 1 Credit
Exclusion:
None
Objective:
Reduce the potential for contamination of plumbing and drainage systems, the
ability of systems to carry infections, and the likelihood of odours.
Requirement:
1 credit for designs that reduce the potential for transmission of harmful bacteria viruses, and
odours.
Remark:
Fulfill 70% of the checklist’s requirement as stated in submission template.
Indoor Environmental Quality
IEQ 2 Plumbing & Drainage
Indoor Environmental Quality
IEQ 2 Plumbing & Drainage
Indoor Environmental Quality
IEQ 2 Plumbing & Drainage
Good
Submission
Access Panel Locations are marked on floor plan for easy
identification and are supported with photographs.
IEQ 3 Biological Contamination – 1 Credit
Exclusion:
Residential Buildings
Objective:
Ensure that the design, installation and facilities for operation and maintenance of air
conditioning systems, and water systems and features, are such as to reduce the risk of
biological contamination.
Requirement:
1 credit for complying with the recommendations given in the Code of Practice - Prevention of
Legionnaires Disease, in respect of air-conditioning and ventilation systems, and water systems.
Remark:
Fulfill 70% of the checklist’s requirement as stated in submission template.
Indoor Environmental Quality
IEQ 3 Biological Contamination
Indoor Environmental Quality
IEQ 3 Biological Contamination
Indoor Environmental Quality
IEQ 3 Biological Contamination
Good
Submission
Checklist + Extract of Specification +
Drawings
IEQ 4 Waste Disposal Facilities – 1 Credit
Exclusion:
None
Objective:
Ensure that the design, installation and facilities waste disposal and recycling are such as to reduce
the risk of odours entering occupied areas or public areas.
Requirement:
1 credit for the provision of a de-odourising system in all refuse collection rooms and chambers
Remark:
• Provision of air purifying devices such as ‘Chemical Air Scrubber’, ‘Bio-oxygen Generator’,
‘Photo-oxidation Generator’ in RS&MRC.
Indoor Environmental Quality
IEQ 4 Waste Disposal Facilities
Indoor Environmental Quality
IEQ 4 Waste Disposal Facilities
Good
Submission Circled the Waste Recovery Chamber for easy identification
Indoor Environmental Quality
IEQ 4 Waste Disposal Facilities
Good
Submission
The provision of air purification devices are stated in the tender
drawing.
Indoor Environmental Quality
IEQ 4 Waste Disposal Facilities
Indoor Environmental Quality
IEQ 4 Waste Disposal Facilities
NB – IEQ 5 / EB – IEQ 6 Construction IAQ Management – 1 Credit
Exclusion:
Residential and similar buildings not provided with central air-conditioning and ventilation systems.
Objective:
Ensure that building ventilation systems are not contaminated as a result of
residuals left over from construction activities.
Requirement:
1 credit for implementing a Construction IAQ Management Plan. (NB only)
1 credit for undertaking a building ‘flush out’ or ‘bake out’; and replacement of all filters prior to
occupancy.
Remark:
• Provision of Construction IAQ Management Plan by Contractor.
• Filtration media with Minimum Efficiency Reporting Value of 13 and shall be replaced after
construction
• Flushing duration subject to calculation of fresh air required to attain IAQ Good Class requirement
Indoor Environmental Quality
IEQ 5 Construction IAQ Management
Indoor Environmental Quality
IEQ 5 Construction IAQ Management
Items that should be included: Good
Submission
Indoor Environmental Quality
IEQ 5 Construction IAQ Management
EB – IEQ 5 Integrated Pest Management – 1 Credit
Exclusion:
None
Objective:
Ensure that the management of pests is safe, hygienic and with limited
environmental impacts.
Requirement:
1 credit for implementing an integrated programme for pest management.
Remark:
NIL
Indoor Environmental Quality
IEQ 5 Integrated Pest Management
Indoor Environmental Quality
IEQ 5 (EB) Integrated Pest Management
Contract with Scope of Work +
Invoice + Photograph of Practices
Good
Submission
NB – IEQ 6 / EB – IEQ 7 Outdoor Sources of Air Pollution – 2 credits
Exclusion:
Buildings that are designed for natural ventilation or using de-centralised a/c system
Objective:
Demonstrate that airborne contaminants from external sources will not
give rise to unacceptable levels of indoor air pollution in normally
occupied spaces.
Requirement:
1 credit for demonstrating compliance with appropriate criteria for CO, NO2 and O3.
1 credit for demonstrating compliance with the appropriate criteria for RSP.
Remark:
• Align with HKSAR IAQ Certification Scheme or ASHRAE 62.1-
2007.
Indoor Environmental Quality
IEQ 6 Outdoor Sources Of Air Pollution
Parameter Unit 8-hr average
Excellent Good
Carbon Dioxide ppm < 800 < 1000
Carbon Monoxide g/m3 < 2000 < 10000
Respirable Suspended Particulates g/m3 < 20 < 180
Nitrogen Dioxide g/m3 < 40 < 150
Ozone g/m3 < 50 < 120
Formaldehyde g/m3 < 30 < 100
Total Volatile Organic Compounds g/m3 < 200 < 600
Radon Bq/m3 < 150 < 200
Airborne Bacteria cfu/m3 < 500 < 1000
Room Temperature oC 20 – 25.5 < 25.5
Relative Humidity % 40 – 70 < 70
Air Movement m/s < 0.2 < 0.3
Indoor Environmental Quality
IEQ 6 Outdoor Sources Of Air Pollution
Indoor Environmental Quality
IEQ 6 Outdoor Sources Of Air Pollution
Source: http://www.iaq.gov.hk/images/IAQ_Cert_excellent.jpg Source: http://www.iaq.gov.hk/images/IAQ_Cert_good.jpg
Copyright © 2011 Business Environment Council
IAQ Certificate Issuing Body
Copyright © 2011 Business Environment Council
NB – IEQ 7 / EB – IEQ 8 Indoor Sources of Air Pollution – 3 credits
Exclusion:
Items a) & b) are excluded for buildings that are designed for natural ventilation or using
de-centralised a/c system and without interior decoration
Objective:
Demonstrate that airborne contaminants, predominantly from inside
sources, do not give rise to unacceptable levels of indoor air pollution in
normally occupied spaces.
Requirement:
1 credit for demonstrating compliance with the appropriate criteria for VOCs.
1 credit for demonstrating compliance with the appropriate criteria for formaldehyde.
1 credit for demonstrating compliance with the appropriate criteria for radon.
Remark:
• Align with HKSAR IAQ Certification Scheme or ASHRAE 62.1-2007.
• Measurement under ‘windows-closed’ condition.
Indoor Environmental Quality
IEQ 7 Indoor Sources Of Air Pollution
NB – IEQ 8 / EB – IEQ 9 IAQ in Car Parks – 1 credit
Exclusion:
Buildings not provided with enclosed or semi-enclosed car parks.
Objective:
Meet the minimum requirements of performance in respect of air quality.
Requirement:
1 credit for demonstrating compliance with the design requirements specified in ProPECC PN 2/96.
Remark:
• Max concentration: CO, 100ppm; NO2, 1ppm
• Measurement duration: 5 minutes
Indoor Environmental Quality
IEQ 8 IAQ In Car Parks
Indoor Environmental Quality
IEQ 8 IAQ In Car Parks
Indoor Environmental Quality
IEQ 8 IAQ In Car Parks
Items that should be
included:
Good
Submission
NB – IEQ 9 / EB – IEQ 10 Increased Ventilation – 1 credit
Exclusion:
Residential and similar buildings without central air conditioning.
Objective:
Ensure that ventilation systems provide for effective delivery to support the well
being and comfort of occupants in normally occupied spaces.
Requirement:
1 credit for demonstrating an outdoor ventilation rate that exceeds ASHRAE 62.1:2007
requirements by at least 30%.
Remark:
• Can demonstrate by calculation or measurements.
Indoor Environmental Quality
IEQ 9 Increased Ventilation
Indoor Environmental Quality
IEQ 9 Increased Ventilation
Good
Submission
Flow Rate Calculation based on MVAC Drawing & Spec
compared to ASHRAE 62.1-2007
NB – IEQ 10 / EB – IEQ 11 Background Ventilation – 1 credit
Exclusion:
Buildings not designed to utilise natural ventilation
Objective:
Ensure that normally occupied premises designed to utilise natural
ventilation are provided with a minimum of background ventilation to
control indoor air pollutants.
Requirement:
1 credit where it can be demonstrated that adequate ventilation can be achieved by natural means.
Remark:
• Can demonstrate compliance by CFD or measurements.
• Minimum 2 ACH in habitable room
Indoor Environmental Quality
IEQ 10 Background Ventilation
Indoor Environmental Quality
IEQ 10 Background Ventilation
Modelling method, calculation and
assumptions are included
Good
Submission
NB – IEQ 11 / EB – IEQ 12 Localized Ventilation – 1 credit
Exclusion:
The second credit is excluded for Residential buildings.
Objective:
Prevent exposure of building occupants to concentrated indoor sources of
pollutants.
Requirement:
a) Source control
1 credit for the provision of an adequate ventilation system for rooms/areas where significant indoor
pollution sources are generated.
b) Local exhaust (NB only)
1 credit for the provision of a general exhaust system for future tenants.
Remark:
Indoor Environmental Quality
IEQ 11 Localised Ventilation
Indoor Environmental Quality
IEQ 11 Localised Ventilation
Equipment schedule & air
schematic are included
Good
Submission
NB – IEQ 12 / EB – IEQ 13 Ventilation in Common Areas – 1 credit + 1 bonus credit
Exclusion:
Spaces covered under the section on IEQ 11 Localised Ventilation
Objective:
Ensure adequate ventilation in common areas and circulation routes within
premises and to avoid cross-contamination between areas. Requirement:
a) Ventilation by any means
1 credit for demonstrating that all enclosed common areas in a building are provided with
adequate ventilation.
b) Use of natural ventilation
1 BONUS credit where the provision for ventilation is by natural means (> 0.5 ACH).
Remark:
• Ventilation rate complies with ASHRAE62.
• At least 80% of common areas are by naturally ventilated.
Indoor Environmental Quality
IEQ 12 Ventilation In Common Areas
Indoor Environmental Quality
IEQ 12 Ventilation In Common Areas
NB – IEQ 13 / EB – IEQ 14 Thermal Comfort in Air-Conditioned Premises – 2 credits
Exclusion:
Buildings where air-conditioning is provided by window units or split units.
Objective:
Ensure that the air-conditioning system can provide the stated design
conditions in occupied spaces under changing load conditions.
Requirement:
a) Temperature
1 credit for sustaining the air temperature at the design value within ±1.5C when the air side
system is operating at steady state under normal occupied periods.
b) Room air distribution
1 credit where room air diffusers satisfy the Air Diffusion Performance Index.
Remark:
• For temperature measurement, ensure 90% prescribed area fulfill the requirement.
• ADPI can by calculation or by in-situ measurement.
• IAQ certificate covering all parts of building can be as alternative. (For Part a and EB only)
Indoor Environmental Quality
IEQ 13 Thermal Comfort In Air-Conditioned Premises
Indoor Environmental Quality
IEQ 13 Thermal Comfort In Air-Conditioned Premises
Measurement location,
device and data log
Good
Submission
NB – IEQ 14 / EB – IEQ 15 Thermal Comfort in Naturally Ventilated Premises – 2 credits
Exclusion:
Buildings where not designed to utilise natural ventilation.
Objective:
Promote the application of measures that reduce elevated temperatures caused
by external heat gains, and ensure installed a/c units can provide adequate
control of indoor temperature.
Requirement:
a) Performance with natural ventilation
1 credit for demonstrating indoor operative temperatures in occupied/habitable rooms meet the
80% acceptability limits.
Alternatively,
1 credit for demonstrating the Predicted Mean Vote (PMV) in occupied/habitable rooms is
between –1 and +1.
Indoor Environmental Quality
IEQ 14 Thermal Comfort In Naturally Ventilated Premises
NB – IEQ 14 / EB – IEQ 15 Thermal Comfort in Naturally Ventilated Premises – 2 credits
Requirement:
Alternatively,
1 credit for demonstrating that, the thermal performance, and the internal wind speeds,
of the occupied/habitable rooms fall within the 80% acceptability range for the tropical
climate conditions of Hong Kong.
b) Performance with air-conditioning
1 credit for sustaining the air temperature at the design value within ±1.5C when the air-
conditioning unit is operating at steady state under normal occupied periods.
Indoor Environmental Quality
IEQ 14 Thermal Comfort In Naturally Ventilated Premises
NB – IEQ 14 / EB – IEQ 15 Thermal Comfort in Naturally Ventilated Premises – 2
credits
Remark:
• By thermal analysis for worst case scenario, most susceptible to external heat gain or
do not benefit from the prevailing climatic conditions.
• For temperature measurement, ensure 90% prescribed area fulfill the requirement.
Indoor Environmental Quality
IEQ 14 Thermal Comfort In Naturally Ventilated Premises
Indoor Environmental Quality
IEQ 14 Thermal Comfort In Naturally Ventilated Premises
Parameter
Clothing (clo)
Air temp. (°C)
Mean radiant temp. (°C)
Activity (met)
Air speed (m/s)
Relative humidity (%)
Indoor Environmental Quality
IEQ 14 Thermal Comfort In Naturally Ventilated Premises
Modelling method, calculation and
assumptions are included
Good
Submission
Results present in a way that is easy
to understand
NB – IEQ 15 / EB – IEQ 16 Natural Lighting – 2 credits
Exclusion:
None
Objective:
Encourage a holistic examination of site layout, building design, and
fenestration design, such as to maximize access to daylight for the purposes of
improved health and comfort.
Requirement:
1 credit where at least 80% of floor area in all normally occupied spaces is adequately lit
with and average daylight factor of 1% or more.
1 credit where at least 95% of floor area in all normally occupied spaces is adequately lit
with and average daylight factor of 1% or more. Remark:
• Daylight factor by measurement or estimation.
Indoor Environmental Quality
IEQ 15 Natural Lighting
Indoor Environmental Quality
IEQ 15 Natural Lighting
Modelling method, calculation and
assumptions are included
Good
Submission
Indoor Environmental Quality
IEQ 15 Natural Lighting
NB – IEQ 16 / EB – IEQ 17 Interior Lighting in Normally Occupied Areas
1 credit + 1 bonus credit
Exclusion:
Residential buildings, hotels and apartment buildings.
Objective:
Ensure the adequacy and maintenance of visual comfort conditions achieved
by the electric lighting provisions in occupied spaces.
Requirement:
1 credit where the prescribed lighting performance in each type of premises in respect of
illuminance and lighting quality is achieved.
• prescribed lighting performance in respect of maintained illuminance and illuminance variation is
achieved; and
• the limiting unified glare rating is achieved and light sources have an appropriate colour rendering
index.
1 BONUS credit for providing automatic control of artificial lighting such as daylight sensors at
perimeter zone and/or occupancy sensor.
Indoor Environmental Quality
IEQ 16 Interior Lighting In Normally Occupied Areas
Indoor Environmental Quality
IEQ 16 Interior Lighting In Normally Occupied Areas
Remark:
• Calculation by computer
modelling.
• Normally occupied area:
Offices, conference rooms,
classrooms, workshop etc
Indoor Environmental Quality
IEQ 16 Interior Lighting In Normally Occupied Areas
Indoor Environmental Quality
IEQ 16 Interior Lighting In Normally Occupied Areas
Modelling method, calculation and
assumptions are included
Good
Submission
NB – IEQ 17 / EB – IEQ 18 Interior Lighting in Areas not Normally Occupied – 1 credit
Exclusion:
None
Objective:
Ensure the adequacy of artificial lighting provisions in common areas and service areas such as
plant rooms.
Requirement:
1 credit where the prescribed lighting performance in each type of common or service space in
respect of light output and lighting quality is achieved.
Remark:
• Parameters include illumiance, illuminace variation, glare index, and colour rendering index.
• Not normally occupied area: Lift lobbies, corridors, plantrooms etc.
Indoor Environmental Quality
IEQ 17 Interior Lighting In Areas Not Normally Occupied
EXCLUSION
Premises where speech intelligibility is not
important / Rooms with special acoustical
nature
OBJECTIVE
Improve acoustical properties of rooms where
speech intelligibility is important
REQUIREMENT
Comply with internal NC level
Comply with mid-frequency (500, 1000, 2000
Hz) reverberation time
Relaxation shall be allowed subject to nature
of building.
NB IEQ 18 / EB IEQ 19 Room Acoustics – 1 credit
Indoor Environmental Quality
IEQ 18 Room Acoustics
When a number of NC (e.g. NC40) is
chosen, it defines the maximum
allowable sound level at all octave bands
centered at 63 Hz to 8000 Hz.
Indoor Environmental Quality
IEQ 18 Room Acoustics
• Reverberation time (T60) is controlled in interior building
spaces to enhance speech intelligibility or enhance music
quality. It is the time it takes for sound to decay by 60dBA.
• Sabine’s equation
• Norris Eyring equation (for highly absorptive rooms)
A
VT
161.060
)1ln()(
161.060
S
VT
V is room volume, S is room surface area,
A is room absorption, α is average sound
absorption coefficients. (All in metric SI units)
Indoor Environmental Quality
IEQ 18 Room Acoustics
• Time for sound energy to decay 60 dB
IEQ 18 Room Acoustics
Reverberation Time
• Reverberation will affect the speech clarity
• Long reverberation time ‘Live’ room with echo
• Short reverberation ‘Dead room’
• Optimum reverberation time: 0.4s to 0.8s
IEQ 18 Room Acoustics
Reverberation Time
Performance Criteria:
a.) Office Type Premises
RT < 0.6s and within NC40
b.) Classroom & Similar Premises
RT < 0.6s and within NC35
c.) Residential Premises, Hotel and
Apartment
0.4s < RT < 0.6s and within NC30
d.) Indoor Games Hall & Swimming Pool
RT < 2s and within NC45
Indoor Environmental Quality
IEQ 18 Room Acoustics
EXCLUSION
Premises which are inherently noisy and
unaffected by noise from adjacent
premises
OBJECTIVE
Improve the noise isolation to reduce
impact of unwanted noise
REQUIREMENT
Comply with noise isolation requirements
For residential only:
Bonus credit for complying with Impact
Noise Isolation requirements
Indoor Environmental Quality
IEQ 19 Noise Isolation
NB – IEQ 19 / EB – IEQ 20 Noise Isolation – 1 credit + 1 bonus credit
Performance Criteria:
a.) Office Premises
Between 2 offices, Dw = 38dB
With privacy, Dw = 48dB
Cellular offices, NIC = 40
b.) Classrooms
Between classrooms (Same floor):
STC37
Between classrooms (between floor):
STC50, IIC46
Indoor Environmental Quality
IEQ 19 Noise Isolation
Performance Criteria:
c.) Residential Premises & Hotel Room
Partition between WC and rooms
DnT, w > 38dB
Partition and floors between rooms
and room / corridor,
DnT,w > 50dB
Indoor Environmental Quality
IEQ 19 Noise Isolation
Performance Criteria:
d.) Residential Premises
Bedroom to living room:
STC 46 (same residential unit)
Bedroom to bedroom:
STC 52, IIC 52 (between units)
STC 44 (same unit)
Living rooms to living room
STC 52, IIC 52 (between units)
Indoor Environmental Quality
IEQ 19 Noise Isolation
EXCLUSION
Building / Premises in which speech
intelligibility is not important
OBJECTIVE
Control as far as practicable the
background noise in premises at
levels appropriate to the intended
use of the premises
REQUIREMENT
Demonstrate background noise levels
are within the prescribed criteria
Indoor Environmental Quality
IEQ 20 Background Noise
NB – IEQ 20 / EB – IEQ 21 Background Noise – 1 credit
Performance Criteria:
a.) Office Premises
Private offices and small conference
rooms: 40 dB LAeq, T = 8 hours or
45 dB LAeq, T = 5 minutes
Large landscaped office: 45 dB
LAeq, T = 8 hours or 50 dB LAeq, T
= 5 minutes
b.) Classrooms
< 45 dB LAmax in urban area
<= 40 dB LAmax between 08:00 to
16:00
Indoor Environmental Quality
IEQ 20 Background Noise
Performance Criteria:
c.) Residential Premises and hotel rooms
Bedroom under window closed
conditions:
30 dB LAeq, T = 8 hours or 35 dB LAeq,
T = 5 minutes and <45 dB between
23:00 to 07:00
Habitable rooms under window closed
conditions: <55 dB LAeq, T = 16 hours
between 07:00 to 23:00
d.) Indoor games halls & indoor swimming
pools
<50 dB LAeq, T = 5 mins
Indoor Environmental Quality
IEQ 20 Background Noise
NB – IEQ 21 Indoor Vibration – 1 credit
Exclusion:
None
Objective:
Avoidance of excessive vibration from
building services equipment and
external sources.
Requirement:
1 credit for demonstrating vibration levels
shall not exceed the prescribed criteria.
Remark:
Consideration of building services equipment.
Indoor Environmental Quality
IEQ 21 Indoor Vibration
IEQ 22 Access for Persons with Disability – 1 credit
Exclusion:
None
Objective:
Ensure full access to pertinent building facilities for persons with disability.
Requirement:
1 credit for providing at least 3 enhanced provisions for disabled persons.
Remark:
Recommended measures as stipulated in latest version of Code of Practice for Barrier
Free Access
Indoor Environmental Quality
IEQ 22 Access For Persons With Disability
Indoor Environmental Quality
IEQ 22 Access For Persons With Disability
Source: http://www.bd.gov.hk/english/documents/code/e_bfa2008.htm
Indoor Environmental Quality
IEQ 22 Access For Persons With Disability
Explanation, extract from Barrier Free
Access, and Supporting Drawings
Good
Submission
NB IEQ 23 Amenity Features – 2 credits
Exclusion:
None
Objective:
Improve the standard and quality of buildings.
Requirement:
a) Amenities for the benefit of building users.
1 credit for providing at least 3 amenity features that enhance the quality and
functionality of building to the benefit of building users.
b) Amenities for improved operation and maintenance.
1 credit for providing at least 3 amenity features that allow for improved operation and
maintenance of the building and its engineering services.
Indoor Environmental Quality
IEQ 23 Amenity Features
Indoor Environmental Quality
IEQ 23 Amenity Features
Mobile-Spider
System Drawing
Explanation and supporting drawings
are included
Good
Submission
Green features - Balconies, Podium Gardens & Mail Delivery Rooms
Amenity features - Air-conditioning Platforms, Prestigious Entrances & Residents’ Clubhouses
Copyright © 2011 Business Environment Council
Indoor Environmental Quality
IEQ 23 Amenity Features
EB IEQ 23 Amenity Features – 2 credits
Exclusion:
None
Objective:
Improve the standard and quality of buildings.
Requirement:
1 credit for providing 50% of listed amenity features that enhance the quality and
functionality of a building.
2 credits for providing 75% of listed amenity features.
Remark:
Nil
Indoor Environmental Quality
IEQ 23 Amenity Features
Indoor Environmental Quality
IEQ 23 Amenity Features
86 86