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2.4 Existing Buildings Roadmap
Tackling the existing buildings head-on
Greater portion of the energy reduction will
come from upgrading our existing buildings.
As previously mentioned, 58% of building
electricity demand in the year 2030 will
come from existing commercial buildings
that have already been built. To enact such
a level of energy reduction, a number of
sequential steps must be pursued:
• Reporting
- the process starts by
enlisting a significant portion of the
existing building stock into a program
of reporting;
• Benchmarking
- the data gained can then
be used for consistent benchmarking;
• Retro-commissioning
- the low-hanging
fruit retro-commissioning process in
bringing the building stock up to defined
performance standard; and finally
• Retrofitting
- the adoption of energy
efficient systems to bring the energy
consumption down to the required level.
Leading themovement through regulatory
drivers
Regulatory support is necessary to enable
a significant portion of the building stock
to enlist in the reporting/benchmarking
and subsequent retro-commissioning/
retrofitting. This takes the forms of:
• Building Energy Codes (BEC)
The BEC should not only be developed
towards
more
stringent
power
specifications of individual equipment.
Appropriate requirements to metering,
facilitate reporting and benchmarking
can also be included in the code.
Furthermore, the BEC should also make
use of data collected in the reporting/
benchmarking exercise to develop
energy performance rating at system
(kW/ton, annual EER) and building levels
(i.e. EUI – Energy Use Intensity);and
• Energy Audit Code (EAC)
The EAC should include clauses that
facilitate (or mandate) reporting,
benchmarking,
retro-commissioning,
and retrofitting. The technical guidelines
can be expanded to provide a framework
for each of these steps.