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05
Important Considerations
Kitchen
Appliances
10%
Comparison of Energy use
around the home
Source: Department of Environmental
& Climate Change NSW
Fridge Other
Heating
& Cooling
Hot
Water
12%
18%
23%
37%
Important Considerations
Household Energy Use
Hot Water systems in general are the largest users
of energy in most Australian homes, so it’s important
to consider all the factors before selecting a hot
water system. High eciency, correctly sized hot
water systems can directly lower the running costs
of a family.
The table opposite indicates where energy is
typically used in an average household. Naturally
this varies from State to State and even house to
house, but the common factoris that hot water will
nearly always be the largest consumer of energy.
Greenhouse Gas Emissions
Increased levels of greenhouse gases have been
identied as one of the major contributors to the
problem of global warming, so anything that can
help reduce our carbon footprint, is benecial to
the environment.
When purchasing a new hot water system, many
people simply put in what was there before without
considering the environmental impact of their
decision. The charts clearly shows that if you
make an informed decision and think about the
consequences to the environment, you in fact have
the opportunity to make a dierence. The purchase
and installation of Rinnai hot water systems and in
particular Gas Boosted Solar are a clear a step in the
right direction.
Running Costs
Running Costs for Hot Water vary depending on the
type of system installed (Continuous Flow or Storage
Cylinder) and the fuel used (Electricity, Gas or Solar).
The Table (opposite) gives an indication of the
annual running costs of various common hot
water systems used in Australia. As hot water use
varies between households and climates, this graph
will change accordingly. We have calculated these
gures using a family of four, having one ve minute
shower a day each and using cold water for clothes
washing. It is a comparative guideline only, based
on various government websites.
Running Costs Per Year
O
Peak
Peak NG LPG
NG LPG NG LPG
Peak
Elec
O
Peak
Elec
O
Peak
Peak
$1000
$500
Electric
Storage
Gas
Storage
(5 Star)
Gas
Continuous
Flow
Solar
Heat
Pump
Solar
Gas Boost
0.4
Tonnes of Greenhouse
Gas Per Year
Source: Energy Strategies 2007 yourhome.gov.au
Based on Sydney
Gas 5 Star
Rinnai
INFINITY
1.2
Gas 5 Star
Storage
1.4
Solar
Electric
Boost
1.5
Electric
Storage
4.2
Heat
Pump
1.1
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