Home' Facility Perspectives : Vol 11 No 2 Contents FACILITY PERSPECTIVES | VOLUME 11 NUMBER 2
ENERGY MANAGEMENT |
New research shows that occupant
comfort is driven as much by air flow and
oxygen levels as by temperature settings.
Suitable temperature settings will depend
on the building, the HVAC system and its
occupants, but generally should track the
external temperature plus or minus seven
degrees. If you must use set points, aim for
19 degrees Celsius in winter and 25 degrees
Celsius in summer. Research has found
that a temperature adjustment of just one
degree Celsius can impact the efficiency
of the HVAC unit and offer up to 10 per
cent energy savings without compromising
Lighting can account for 40 per cent or more
of energy costs in a commercial building or
tenancy. Savings of between 75 and 90 per
cent4 of lighting energy costs can be achieved
using efficient lighting strategies, and it is one
of the simplest activities to implement while
often offering very good returns on investment.
The Commercial Building Disclosure (CBD)
Program regards seven watts per square metre
as best practice.
In many cases, decent cost savings can
be achieved by making minor behavioural
adjustments, such as implementing a ‘switch
off’ campaign, adjusting automatic timers,
zoning lighting, de-lamping and optimising
daylight when it is is available.
Technological strategies that can be applied
include a retrofit or replacement of older
inefficient lighting with highly efficient lighting
types; appropriate zoning for switching; and
installation of timers, motion and daylight
sensors. Upgrading lighting can also attract
financial credits as part of some state
governments’ energy reduction programs – for
example, the Victorian Energy Efficiency Target
(VEET) scheme in Victoria, and the Energy
Savings Scheme (ESS) in New South Wales.
Office equipment, computers and server
rooms can account for up to 65 per
cent of an office’s energy use. Key to
efficient IT is good ‘switch off’ behaviour;
consolidating and optimising servers/
printers; and procuring energy-efficient
equipment. There’s the useful ‘Greening
your Information and Communications
Technology (ICT)’ guide on the CitySwitch
website, which is a good place to start.
Proving the case
Efficiencies in HVAC, lighting and other
energy efficiency activities are reflected in
an improvement in a NABERS Energy rating
and lower operating costs. Following are a
selection of case studies from the CitySwitch
website. Each case study demonstrates the
benefits of energy efficiency strategies through
verified cost savings, and improved NABERS
3 DTZ implemented lighting, HVAC and
office equipment efficiency strategies
and reduced its energy costs by
40 per cent while improving its NABERS
Energy rating from 3.5 Stars to 5 Stars.
3 Craft Victoria achieved an 18 per cent
energy reduction in its Melbourne
office by upgrading its lighting and
implementing behavioural changes,
which included HVAC strategies.
3 Ozwide Group upgraded to more
energy-efficient lighting technology and
achieved a 60 per cent reduction in its
energy bills with a three-year payback.
3 PwC Sydney reported a 29 per cent
lighting-energy cost saving due to
implemented energy-efficient lighting
technologies and controls.
3 Australian Institute of Management
reduced its lighting loads by 20 per cent
through implementing occupancy-based
switching and an LED lighting retrofit.
For those who are already reaping the
benefits of efficient lighting, HVAC and
equipment, don’t stop there – consider
exploring other sustainability activities, such
as behaviour-change actions, renewable
energy, building performance tuning,
waste management improvements, policy
changes, green leasing, indoor air quality
improvements, or even going carbon
neutral. These actions will contribute to
creating an efficient, environmentally
responsible building or organisation, and will
demonstrate that you’re keeping up with the
trend of business, and the property market.
The trend for business and buildings is
clear: both need to be efficient to remain
competitive in the marketplace. There are
many simple, cost-effective strategies that
can be applied to obtain the benefits.
CitySwitch is a free program available for
businesses and building owners/managers
to access for free advice, industry leadership
and best practice approaches. It provides
impartial support, guidance, and a network of
likeminded businesses that can be leveraged
to achieve a variety of business and building
efficiency and sustainability goals.
For those looking to upgrade their
buildings, the cost savings, lower vacancy
rates and better market pricing makes
upgrading buildings the inevitable no-brainer.
The CitySwitch program provides support
to help to achieve this. Contact your local
program manager for further information.
Lighting can account for 40 per cent or
more of energy costs in a commercial
building or tenancy. Savings of between
75 and 90 per cent4 of lighting energy
costs can be achieved using efficient
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