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BEAM P
LUS FOR
E
XISTING
B
UILDINGS
F
RAMEWORK
V
ERSION
1.2
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 22
I
EQ
15 T
HERMAL
C
OMFORT IN
N
ATURALLY
V
ENTILATED
P
REMISES
1 credit for demonstrating indoor operative temperatures in occupied/habitable
rooms meet the 80% acceptability limits.
Alternately,
1 credit for demonstrating the Predicted Mean Vote (PMV) in
occupied/habitable rooms is between –1 and +1.
Buildings that are not
designed to utilize
natural ventilation.
1
1 credit for sustaining the air temperature at the design value within ±1.5
C when
the air-conditioning unit is operating at steady state under normal occupied
periods.
1
I
EQ
16 N
ATURAL
L
IGHTING
1 credit where at least 80% of the floor area in all normally occupied spaces is
adequately lit with an average daylight factor of 1%.
2 credits where at least 95% of the floor area in all normally occupied spaces is
adequately lit with an average daylight factor of 1%.
None.
2
I
EQ
17 I
NTERIOR
L
IGHTING IN
N
ORMALLY
O
CCUPIED
A
REAS
1 credit where the prescribed lighting performance in each type of premises in
respect of illuminance and lighting quality is achieved.
It is required to fulfill prescribed lighting performance in respect of maintained
illuminance and illuminance variation; and the limiting unified glare rating is
achieved and light sources have an appropriate colour rendering index.
Residential buildings,
hotels and apartment
buildings.
1
1 BONUS credit for providing automatic control of artificial lighting
such as daylight sensors at perimeter zone and/or occupancy sensor.
1B
I
EQ
18 I
NTERIOR
L
IGHTING IN
A
REAS NOT
N
ORMALLY
O
CCUPIED
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.
None.
1
I
EQ
19 R
OOM
A
COUSTICS
1 credit for demonstrating that internal noise levels are within the prescribed
criteria and the mid-frequency reverberation time in applicable rooms meets the
prescribed criteria for give types of premises.
Based on the nature of the building, relaxation should be allowed in considering
the acceptance of this credit. The applicant should provide full submission of the
design and calculation to justify the relaxation.
Buildings/premises
where speech
intelligibility is not
important, and rooms of
a special acoustical
nature.
1