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BEAM P
LUS
I
NTERIORS
C
OMMERCIAL
, R
ETAIL
A
ND
I
NSTITUTIONAL
W
ATER
U
SE
(WU)
WU 2 A
NNUAL
W
ATER
U
SE
Copyright © BEAM Society Limited. All rights reserved. Page 95
WU 2 A
NNUAL
W
ATER
U
SE
E
XCLUSION
None.
O
BJECTIVE
Reduce the consumption of fresh (potable) water through the
application of water saving devices that have proven performance and
reliability.
C
REDIT ATTAINABLE
2
C
REDIT REQUIREMENT
1 credit for demonstrating that the use of water efficient devices leads
to an estimated aggregate annual water saving of 30% when
compared with BEAM Plus baseline.
2 credits for demonstrating an estimated annual water saving of 40%
when compared with BEAM Plus baseline.
A
SSESSMENT
Criteria
Calculation shall be provided to determine the reduction of water
consumption in the project space compared with a similarly occupied
space whose water fittings and appliances conform to a baseline
performance. The calculation should take into account the number of
employees, and the number of operational days per annum. This
information must be supplied by the Applicant and may be stated in
the design brief or OPR.
Water use is based either on a ‘per operation’ basis or as the product
of flow rate and operation time. The default assumptions are given in
Appendix 9.3 .Number of water devices installed and frequency of use
must be the same for both the baseline and project case.
Alternative:
If water taps and shower heads are not provided within th
e project space but located in the shared common area (e.g. toilets/bathroom
shared with other tenants (or in retail premises located within
shopping centres etc) within the host building that is available to the
user of the project space:
1 credit can be achieved if, on same floor as the project
space, sensor type water taps are installed in the
shared/common area.
1 additional credit can be achieved where the Applicant
demonstrates that all water taps, mixer taps, and shower
heads (where installed) on that floor of the host building
comply with voluntary Water Efficiency Labelling Scheme
(WELS) [
1]Grade 1 labelled or have an equivalent or lower
flow rate.
This alternative approach encourages conservation and raises
awareness, ultimately market forces motivating the building owner to
select or retrofit with water efficient fixtures.
Documentation
Credit(s) shall be achieved when the Applicant provides the
documentation stated below, to demonstrate compliance:
i.
Water saving calculation, example given in
Appendix 9.3 .ii.
Drawings, architectural, floor layout plan;
1
Water Supplies Department. Voluntary Water Efficiency Labelling Scheme.
http://www.wsd.gov.hk/en/plumbing_and_engineering/wels/index.html