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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
14 T
HERMAL
C
OMFORT IN
A
IR
-
CONDITIONED
P
REMISES
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 132
6
IEQ
6.5
T
HERMAL
C
OMFORT
I
EQ
14 T
HERMAL
C
OMFORT IN
A
IR
-
CONDITIONED
P
REMISES
E
XCLUSIONS
Premises where air-conditioning is provided by window units or split
units.
O
BJECTIVE
Ensure that the air-conditioning system can provide the stated design
conditions in occupied spaces under changing load conditions.
C
REDITS ATTAINABLE
2
P
REREQUISITES
None.
C
REDIT REQUIREMENT
a) Temperature
1 credit for sustaining the air temperature at the design value within
±1.5
C 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.
A
SSESSMENT
The Client shall provide evidence in the form of a report prepared by a
suitably qualified person detailing the performance criteria with respect to
thermal comfort conditions for all types of premises included in the
building, and the results of the measurements in the specified sample of
premises.
a) Temperature
The measurement locations shall include at least one representative
sample of each type of premises (occupied spaces) as defined by the
type of HVAC system used, design occupancy density, nature of usage,
zoning, etc. The main physical parameters of the indoor climate (air
temperature and relative humidity) are undertaken in normal occupied
periods. The results shall demonstrate compliance with the prescribed
design criteria within the prescribed limits, for a minimum of 90% of the
prescribed locations. The measurement shall be made with reference to
the current EPD’s IAQ certification scheme. The sensors used in the
measurement survey shall have an accuracy that complies with
ASHRAE 55-1992 [1], ISO 7726 [2] or equivalent.
Where certification under the IAQ Certification scheme [3] is current and
covers all parts of the building for which BEAM certification is being
sought then the credit shall be awarded.
b) Room air distribution
The measurement locations shall be as for a). It is acceptable to
demonstrate the credit compliance by either calculation or by in-situ
measurement.
B
ACKGROUND
The HVAC system should be able to maintain room conditions (within
acceptable tolerances) under normal occupied periods. Measurements
under such circumstances can demonstrate compliance with the
operating requirements.
1
American Society of Heating, Refrigeration and Air-conditioning Engineers. ASHRAE 55-1992: Thermal Environmental
Conditions for Human Occupancy. Atlanta 1992.
2
International Standard Organization. International standard 7726, Ergonomics of the thermal environment — Instruments
for measuring physical quantities. 1998.
3
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.pdf