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BEAM P
LUS FOR
E
XISTING
B
UILDINGS
I
NDOOR
E
NVIRONMENTAL
Q
UALITY
(I
EQ
)
V
ERSION
1.2
I
EQ
8
I
NDOOR
S
OURCES OF
A
IR
P
OLLUTION
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 121
6
IEQ
6.3
I
NDOOR
A
IR
Q
UALITY
I
EQ
8 I
NDOOR
S
OURCES OF
A
IR
P
OLLUTION
E
XCLUSIONS
Items a) & b) are excluded for
buildings that are designed for natural
ventilation or using de-centralised a/c system.
O
BJECTIVE
Demonstrate that airborne contaminants, predominantly from inside
sources, do not give rise to unacceptable levels of indoor air pollution in
normally occupied spaces.
C
REDITS ATTAINABLE
3
P
REREQUISITES
Compliance with relevant chapters of the Occupational Safety and
Health Ordinance.
C
REDIT REQUIREMENT
a) Volatile organic compounds (VOCs)
1 credit for demonstrating compliance with the appropriate criteria for
VOCs.
b) Formaldehyde (HCHO)
1 credit for demonstrating compliance with the appropriate criteria for
formaldehyde.
c) Radon (Rn)
1 credit for demonstrating compliance with the appropriate criteria for
radon.
A
SSESSMENT
The Client shall provide a report prepared by a suitably qualified person
detailing the criteria adopted for indoor air quality for each type of
normally occupied premises within the building development.
Where the Client does not offer criteria, BEAM aligns with the HKSAR
IAQ Certification Scheme [1]. The criteria for air-conditioned buildings
shall be those defined under Good Class in Table 1 of the scheme
Guide. For other occupied areas and habitable rooms the criteria can be
that defined in the Guide, in ASHRAE 62.1-2007 [ 2 ] or equivalent
standard.
Compliance shall be demonstrated by measurement. The report shall
identify the measurement protocol. i.e., the measuring equipment used,
duration of measurements, number and details of the sampling points,
the measurement results, and overall conclusions from the
measurements survey. The number of measurement points shall make
reference to IAQ Certification Scheme.
A sample at the lowest outdoor air intake location can help to identify the
relative contribution of VOCs from indoor and outdoor. However, the
common alpha track detector and gamma ray detector for radon
detection are not regarded as suitable for measurement. Scintillation
cells and electronic monitors are more suitable for both grab sampling
and continuous measurements.
The objective of sampling is to ensure that the building will not suffer
unduly from outside sources of pollution. The sampling protocol (number
and locations of samples) shall follow as a minimum that given in
Appendix 8.6. Any other protocol demonstrated to be of equal rigour
appropriate to the nature of the premises surveyed would be acceptable.
1
Indoor Air Quality Management Group. A Guide on Indoor Air Quality Certification Scheme for Offices and Public Places.
http://www.iaq.gov.hk/cert/doc/CertGuide-eng.pdf2
American Society of Heating Refrigeration and Air Conditioning Engineers. ASHRAE Standard 62.1. Ventilation for
Acceptable Indoor Air Quality, Atlanta 2007.