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BEAM P
LUS
I
NTERIORS
C
OMMERCIAL
, R
ETAIL
A
ND
I
NSTITUTIONAL
A
PPENDICES
9.1 A
SSESSMENT
F
RAMEWORK OF
E
NERGY
P
ERFORMANCE
Copyright © BEAM Society Limited. All rights reserved. Page 126
same as the proposed system with the same components
(albeit with minimum performance requirements). For
example: both baseline and designed building will have VAV,
though the designed building can have better fan efficiencies]
And/or,
ii.
A better OTTV (Overall Thermal Transfer Value), on condition
that the energy reduction (as a result of better OTTV) counted
towards the reduction should be limited to not more than 5%
of the energy budget, and/or
iii.
Having recovered energy or renewable energy captured or
generated on site.
For the purpose of quantifying energy reduction for air conditioning
and lighting as a result of efficient design towards demonstration of
compliance to this credit, the reduction due to OTTV (e.g. apply Low-E
window film if allowed by the building management of the host
building) need not be limited to 5% of the energy budget, and the
acceptable reduction measures are extended to:
i.
An improvement over the corresponding minimum allowable
levels of performance in any one or more of the items listed
with energy efficiency requirements in Sections 5 to 6 of BEC
(lighting and A/C);
ii.
Reduce facade heat gain through improved OTTV;
iii.
Adoption of load reduction strategies, including but not limited
to natural ventilation, free-cooling, natural daylight etc. When
the selected simulation program cannot adequately model a
design or a control strategy, exceptional calculation method
can be used with reference to 8.1.6 - ASHRAE Approach (see
below);
iv.
Addition of energy reduction components, such as (but not
limited to) variable speed drives, heat recovery, energy
efficient lamps and ballasts, light pipes and light tubes,
sensors (daylight, CO
2
, occupancy), dimming devices, etc.;
v.
Reduction in energy use through the selection of a more
efficient system, such as (but not limited to) A/C equipment
with higher COP than BEC minimum requirements, LED
lighting reducing the lighting power density etc.
Baseline Design
For the purpose of assessment of this credit, the baseline case should
also be developed based on design case but with the following
important distinctions:
Modifications as described by clauses A3.3.2 and A3.3.4;
Energy saving devices and load reduction strategies need not be
included in the baseline case. These are defined as components or
operation strategies that reduce energy use while delivering the same
level of environmental comfort to the interior space. Classification of
energy saving devices and load reduction strategies is subject to the
acceptance of the BAS.
Baseline Air-Conditioning System
For the purpose of assessment of this credit, the baseline air-
conditioning should have identical zoning to the designed-case, and
should be modelled with a system and equipment identical to the
designed-case as stated in A3.3.5 of BEC, concerning air-conditioning