IMO, the biggest visual impact of 6stars is that most buildings will again have eaves!
http://planning.sa.gov.au/index.cfm?obj ... 3A96013410
New regulatory requirements: Sustainable Housing
Increased energy efficiency requirements for all new dwellings built in South Australia will come into effect from Wednesday 1 September 2010.
The new ‘6-star’ energy efficiency requirement – which also applies to alterations or additions to existing homes – replaces the previous 5-star energy efficiency requirement which had been in place since 2006.
What are the major changes from 5 stars to 6 stars?
How can new homes and extensions comply?
- * An increased level of insulation required in walls, roofs and suspended floors
* More comprehensive requirements placed on glazing.
The BCA and the SA Housing Code provide two ways of achieving compliance with the 6-star requirements:
House energy rating assessments can be conducted by registered House Energy Rating Assessors. A Register of House Energy Assessors is available on this site.
- * Designing and constructing in accordance with new prescriptive provisions (these will be available in SA Housing Code Amendment 18, due for adoption on 1 May 2010)
* Having assessment by an approved computer-based energy efficiency rating program (such as FirstRate5, AccuRate or BERSPro) with the result a 6 star rating or better and certain prescriptive construction requirements.
The prescriptive measures contained in the Building Code include different levels of insulation for various building elements (walls, floor and roofs) for different climate zones (SA has three different climate zones - see our Climate Zones page), and restrictions on the amount and type of glazing in an external wall. The area of glass is limited based on the amount of shading provided and the orientation of the wall. A house with no eaves and no additional shading to the windows is required to have less glazed area than a house with eaves.
Good shading of windows (such as eave overhangs) and good orientation of the house (so that the main windows to living areas are facing due north) will enable the new requirements to be met for minimal cost (a few hundred dollars for more efficient insulation).
Good design, including thoughtful consideration of the orientation of the home, will help meet the 6 star efficiency requirements and save long-term energy-use costs.
The increased energy efficiency requirements for housing - along with new energy efficiency requirements for commercial buildings set to come into effect in August - will help in meeting Target 3.14 of South Australia's Strategic Plan to increase energy efficiency in dwellings by 10 percent within 10 years.
There are two ways new homes and extensions can achieve compliance with the current 5-star requirements:
Who will check that new homes and extensions comply?
- * Designing and constructing in accordance with new provisions in either the Building Code of Australia or the SA Housing Code (see SA Housing Code Amendment 17 (May 2009) - Appendix H [PDF 280.6 KB])
* Having assessment by an approved computer-based energy efficiency rating program (such as FirstRate5, AccuRate or BERSPro) with the result a 5 star rating or better.
Under the Development Act, development approval is required from the council for all building work to ensure it complies with the BCA or the SAHC. Before this approval can be issued, either the council or a private certifier must assess the design of new homes and extensions against the BCA or the SAHC. This assessment includes checking the design for compliance with the 6-star energy efficiency requirements.
Can house energy ratings be calculated with the use of heavy drapes and pelmets in order to achieve the 6-star energy efficiency requirements?
Attaining a star rating with the use of heavy drapes and pelmets cannot be used for compliance with the Building Rules if there is any doubt about the installation taking place.
Software tools such as FirstRate5, BERSPro and AccuRate are valid assessment programs. FirstRate5 and AccuRate only allow for the use of Holland Blinds on glazing to be included as part of the building shell.