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BEAM P
LUS FOR
N
EW
B
UILDINGS
I
NDOOR
E
NVIRONMENTAL
Q
UALITY
(I
EQ
)
V
ERSION
1.2
I
EQ
6 O
UTDOOR
S
OURCES OF
A
IR
P
OLLUTION
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 153
6
IEQ
6.3
I
NDOOR
A
IR
Q
UALITY
I
EQ
6 O
UTDOOR
S
OURCES OF
A
IR
P
OLLUTION
E
XCLUSIONS
Buildings that are designed for natural ventilation or using de-centralised
air conditioning system.
O
BJECTIVE
Demonstrate that airborne contaminants from external sources will not
give rise to unacceptable levels of indoor air pollution in normally
occupied spaces.
C
REDITS ATTAINABLE
2
P
REREQUISITES
None.
C
REDIT REQUIREMENT
a) Carbon monoxide (CO), Nitrogen dioxide (NO
2
) and Ozone (O
3
)
1 credit for demonstrating compliance with the appropriate criteria for
CO, NO
2
and O
3
.
b) Respirable suspended particulate (RSP, PM
10
)
1 credit for demonstrating compliance with the appropriate criteria for
RSP.
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 areas 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. For
other occupied areas and habitable rooms, the criteria can be that
defined in the Scheme, 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. Measurements shall be made at all fresh air
intake locations.
For RSP, the instrument type used shall be of gravimetric type, such as
cyclone elutricator or impactor. An instrument based on the optical
scattering method is acceptable with a referenced calibration curve with
respect to a gravimetric instrument. In a zone where it can be
demonstrated that CO, NO
2
, O
3
and RSP are solely from outside,
measurements can be taken at the outdoor air intake locations where
CO, NO
2
, O
3
and RSP are likely to infiltrate.
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 8.7. Any other protocol demonstrated to be of equal rigour
appropriate to the nature of the premises surveyed would be acceptable.
In the case of occupied/habitable rooms in air-conditioned/naturally
ventilated buildings the measurement of indoor air pollutants shall take
place whilst operating in the naturally ventilated mode. Given that air and
pollutant exchange with the outside depends on prevailing climatic
conditions, particularly wind speed and direction, it is expected that due
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.