BEAM Plus Existing Buildings

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BEAM PLUS FOR EXISTING BUILDINGS ENERGY USE (E U)
V ERSION 1.2 E U 1 REDUCTION OF CO2 E MISSIONS
Copyright © 2012 BEAM Society Limited. All rights reserved.
Page 71
Code [6] also satisfies the first two credits. Certification under either
scheme shall be submitted to demonstrate compliance.
The first alternative assessment is limited to premises for which energy
consumption indicators and benchmarks are available in EMSD’s Energy
Consumption Indicators and Benchmarks [7]. Up to 4 additional credits
are available using this alternative assessment criterion.
The Client shall submit details of the premises/areas/facilities in the
building, their areas (m2) and uses, billing data for up to 3 years previous,
and details as per submissions to the on-line documentation provided by
EMSD.
Where a building includes a variety of premises/uses as identified in the
Indicators and Benchmarking the credits awarded shall be weighting by
percentage of floor area of the areas/premises covered in the
submission. For example, assuming A, B and C are various ‘Principle
Group/Major Group’ areas as identified in the database, and have
percentages of 30%, 30% and 40%, respectively of the total building
area. A is within the 30% cumulative percentage, B is within 10%, and C
is within 40%. The weighted credit score is then (0.3x2) + (0.3x4) +
(0.4x1) = 2.2 > 2 credits.
USE OF BILLING/
METERING DATA
Alternatively, in addition to compliance with the air-conditioning and/or
lighting codes up to 3 credits are available for demonstrating a reduction
in annual energy use, and up to 2 credits for demonstrating a reduction in
electricity maximum demand, based on billing/metering data.
The starting point for the audit shall be any period after which the
building became fully occupied, or for at least the past 3 years. Changes
of occupancy, use, etc. over the audit period shall be stated, and an
estimation of energy saving resulting from under utilisation of the building
or change of use shall be included.
Whichever of the alternative assessments are submitted the onus shall
be on the Client to demonstrate what management initiatives (rather than
changes in occupancy or use) have served to reduce annual energy use
and/or maximum demand, that there has been consistent improvement,
and that the gains are likely to be maintained.
BACKGROUND BEAM encourage energy saving and reduction in maximum electricity
demand. The alternative credit and assessment criterion takes into
account that existing buildings may or may not have been assessed
under previous versions of BEAM, but also the accuracy and reliability of
data used.
6 Electrical and Mechanical Services Department. Performance-based Building Energy Code.
7 Electrical & Mechanical Services Department. Energy Consumption Indicators and Benchmarks.