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While there are a few benchmarking rating by using a ‘what-if’ function based likely benefits due to the changes. This pushes
programmes worldwide, such as ENERGY on the correlation between energy use the conventional benchmarking system from
STAR Portfolio Manager in the US and Energy and performance and non-performance a rating-oriented benchmarking tool to an
Performance Certificates in the UK, they parameters. By adjusting the performance improvement-oriented benchmarking tool.
are limited to benchmarking the existing parameters, the predictive module in the
urban form. The HKGBC has initiated the ‘what-if’ function evaluates the relative While the development of the benchmarking
development of an online benchmarking improvement of the energy use over the tool is still in progress, preliminary outcomes
tool tailor-made for Hong Kong to provide base case. The updated result calculated by show the proposed approach is able to
existing buildings with energy improvement the Advanced Tool will be able to advise an provide a reasonable outcome for energy
opportunities aligned with the overall carbon improved performance by comparison with prediction and rating of commercial buildings.
reduction target and roadmap for Hong Kong the Basic Tool. This research can be further developed by
based on state-of-the-art methods and rating fully exploring different types of buildings in
systems worldwide, and an understanding The Basic Tool and Advanced Tool together Hong Kong.
of the current limitations of existing form an integrated system, which not only gives
benchmarking systems. ratings to a building’s energy performance,
but quantifies future energy management
The unique feature of this energy opportunities. This system provides the
benchmarking tool is the capability to go flexibility of testing different improvement
beyond the Basic Tool energy efficiency options in energy efficiency and predicts the

HONG KONG REPORT ON THE STATE OF SUSTAINABLE BUILT ENVIRONMENT 2014 75
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