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25

38 167

743Heating

nd Cooling

Water Heating

overage of BCAnergy EfficiencyRequirements

OtherAppliances

Lighting

Refrigeration

CookingStandby

Totalmin.

R-Value

0

1

2

3

4

5

65.1

2.7 2.8

1.4

Roof &Ceiling

Externalwalls

[4]

26

133

63

How Have Housing Energy Efficiency Requirements Made A Difference?

2003

ergy efficiency requirements for new housing were first introduced into the Building Code of Australia (BCA) Housing Provisions in03. The objective was to reduce energy use and hence greenhouse gas emissions. Since then, Australians have been able to enjoy

ectricity and gas savings by living in energy efficient homes with reduced consumption of operational lighting, heating and coolingergy.

Location: Adelaide, South AustraliaClimate Zone: 5

2013

sclaimer: While the ABCB has made every effort to ensure that the material in this document is accurate and up to date, such material does in no way constitute the provision of professional advice.The ABCB gives no warranty or guarantee and accepts no legal liability whatsoever arising from or connected to the accuracy, reliability,rrency or completeness of any material contained herein. Users should seek appropriate independent professional advice prior to relying on, or entering into any commitment based on material within this document in relation to building or related activities. Its interpretation in no way overrides the approvals processes in any jurisidiction.

The two hypothetical residential properties illustrated above - a 2003 house and a 2013 house - depict the evolution of a typical Australianhome. The changes reflect the implementation of stronger minimum energy efficiency requirements in the Building Code of Australia (BCA) ,increasing from a 3 to 6 star energy rating.Note: Values stated below are indicative only.

NatHERSRating

Energy ConsumptionkWh/ m per annum

Generally, the higher the R-valuethe better the thermal performance.

Fluorescent light bulbs use about 25%

of the energy of traditional light bulbs.

Depending on the climate you live in,

solar hot water systems can provide

between 50% to 90% of your hot water

for free just by using the suns energy.

Thermal Performance

Artificial Lighting

Selection of the appropriate glazingand permanent shading devices foryour climate zone is a key element of

passive design.

Save up to 45% on heating and

cooling energy with a well

insulated roof and ceiling, and

an additional 20% with wall

insulation.*

Shading can block up to 90% of

heat gained from direct sunlight.*

Appropriate shading of glass and

openings reduce unwanted heat

gain in summer, improves

comfort, and saves on building

cooling costs.

How do we use energy?

Glazing & Shading

2003

2013

Single clear glass,aluminium framing

Typical Constr uction:

Double glazed clear glass,aluminium framing

2003

2013

2003-2013, A ComparisonWhats in a Star?

Heated Water SystemInsulation

The use of efficient lighting solutions wasrequired with the introduction of the lightingprovisions in 2010.

Higher performance glazing requiredfor larger glazed areas and in certainorientations.

Windows

[1]

Electric energy

TraditionalIncandescent

CFL or LED

Energyefficientlighting solutions

2003(no BCA requirements)

2013

2003(no BCA requirements)

2013

] Approximate values calculated from NatHERS star criteria] Source: YourHome (4th edition, 2010), Baseline Energy Estimates] The BCA is part of the National Construction Code Series] Total R-Value includes added insulation and building construction (m.K/w)

Source: YourHome (4th edition, 2010)

Renewable or lowGHG intensity energy

[3]

[2]

Roof lights

http://www.abcb.gov.au/