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Section J | Part J (Deemed-to-Satisfy)
Section J of the National Construction Code (NCC) requires minimum levels of energy efficiency to be achieved for non-residential buildings (Class 2-9) to reduce the amount of energy a building requires for its normal operation.
This method of assessment is essentially a ‘checklist’ solution whereby each building element must meet the Deemed-to-Satisfy provisions set out in Volume One of the NCC.
The main elements which are assessed include the roof/ceiling, walls, floor, glazing and building sealing.
There is no flexibility with this method of assessment as each element needs to comply independently. The advantage though is that it is fairly quick and works well for simple buildings with minimal glazing.
For buildings that do not comply with the DTS provisions above, the alternative method of compliance is via a JV3 Alternative Solution.
JV3 involves a 3D computer simulation to demonstrate that the annual energy consumption of the proposed building is equivalent or better than the annual energy consumption of a reference building which complies with the Part J DTS provisions.
There are many benefits to JV3 assessments. This is mainly derived from the ability to consider the building as a whole, instead of individual components in isolation. This provides much greater design flexibility and the ability to “trade off” between different building elements.
This often results in more cost effective building specifications such as increasing insulation rather than upgrading to double glazing.
NABERS (National Australian Built Environment Rating System) can be used to measure a building’s
NABERS compares the performance of the building or tenancy to benchmarks on a scale of 1 to 6 stars.
NABERS is primarily targeted at improving the performance of existing buildings however it can also be used to promote new buildings prior to construction provided that a Commitment Agreement is signed.