What is a jv3?
A JV3 is the performance solutions route to compliance in Volume 1 of the NCC. It is a whole of building simulation that is used to determine how the building performs when compared to a reference building.
what is a reference building?
To get a reference building, first a computer model must be made of your proposed development. The reference building is determined by modeling the first building to the Deemed to Satisfy Provisions of the Building Code (NCC | BCA). Once the values are loaded into the software, the software will determine the energy consumption of that building if that building were to be built using a Section J report type outcome. Once the energy consumption is determined different attributes can be adjusted/ altered to equal or improve on the overall energy consumption when compared to the reference building.
why use a JV3
JV3 simulations allow for much more flexible design. Put simply is allows for you to underperform in some places and compensate by over performing in other places. This is very useful in particular when it comes to renovations or retrofitting. During a renovation to an existing building, there might be numerous reasons why some aspects cant be changed. These might include things such as:
- Heritage requirements
- It may not be possible to modify certain part of a building due to heritage requirements, JV3′ allow you to ignore those parts and make up for the losses in places which aren’t restricted.
- Every building is different, and while something might be cost effective on one building, doesn’t mean it’ll be cost effective on the next. JV3’s allow you to increase performance in places where increases are cheaper to implement while reducing performance in places where it’s expensive.
- Design Constraints
- Often with energy efficiency, to get something that performs better, you need more room. However just as often, you might not be able to accommodate something like thicker insulation in a roof as you have strict RL’s. JV3’s allow for you to offset the performance elsewhere.
- With particular reference to landmark type buildings, the vision of the building designer might be of high importance. A simple example of this might be the want to include stained glass windows. Typically stained glass windows would have low performance, and its impractical to have double glazed stained glass from an aesthetics standpoint. A JV3 would allow the determination of a solution in this instance.
How long does a jv3 take?
The complexity of your building will have a great influence on this question. However reasonably you may expect 1-2 weeks to complete the report.
How much does a jv3 cost?
Again this will depend on complexity. JV3’s typically start at $1800, through to $5000 for larger more complex buildings.