JV3 Alternative Solution – What is a JV3?

23 June 2015

JV3 Alternative Solution: A cost saving method to Section J compliance

DTS Compliance

In every building that has an exposed floor – for example a floor above a basement car park, there is a requirement under the Section J DTS approach to provide insulation between these floors, and any unconditioned space below.

Also, many developments like to incorporate large areas of glazing to their preferred specification which can cause issues regarding DTS glazing requirements – which penalise a large glazing to façade ratio. DTS requirements present a challenge to developers and architects, often forcing the use of expensive double glazing, or heavily tinted windows on façades where they intend to display goods, or require high levels of daylight.

The above requirements that are common in the DTS Glazing Calculator present a challenge that can be solved with the use of a JV3 Alternative Solution, whilst providing architects and developers with greater design flexibility, as well as saving many thousands of dollars in construction costs.

What is a JV3 Alternative Solution?

A JV3 Alternative Solution is a computer simulated model of the proposed building, which is compared to the building as if it were built with DTS requirements. Because DTS requirements are often not the best performance solution for a development, the proposed building can always outperform the DTS models energy demand, therefore allowing the building to be constructed to the architect or developers preferences, whilst saving thousands of dollars in materials as well as simplifying the building process.

Some benefits of a JV3:

  • Provides greater design flexibility whilst complying with Section J requirements
  • Supersedes the requirements of the glazing calculator
  • Can allow the removal of suspended floor insulation
  • Can allow designs unfeasible with DTS requirements to be implemented with ease by compensating in other, easier to manage areas of the design
  • Saves the money of the assessment, plus thousands more

Case Study: Mixed-Use commercial development

97 Old Pittwater Road, Brookvale (May 2015)

97 Old Pittwater Road, Brookvale

Image Source

This project is a mixed-use commercial development, with a large, 3 storey child care centre with vast areas of exposed floor on each level, as well as 18 industrial units with exposed mezzanine floors. The standard Deemed to Satisfy (DTS) approach required a different glazing specification on each façade, from high spec double glazing, to heavily tinted windows. There were also large areas of exposed floor throughout each level of the child care centre development, as well as the mezzanine levels to the industrial units, which all required insulating to R2.00.


  • The use of a JV3 Alternative Solution enabled single glazed, low-e glass to be used throughout the development, which eliminated the use of expensive heavily tinted and double glazed windows as required by DTS.
  • 510m2 of exposed floor insulation was removed throughout the development, providing a cost saving in the tens of thousands of dollars.

Case Study: Multi-Residential Development with commercial spaces below

23-27 Lindfield Avenue (June 2015)

This project is a large multi-residential development with a commercial space and underground car park below. Due to the high glazing to façade ratio, the glazing calculator was harsh and did not meet the needs of the client. Also, the large commercial areas sat above an underground car park, requiring R2.00 to all floors of the commercial development.

23-27 Lindfield Avenue, Lindfield

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  • By implementing a JV3 Alternative Solution, the glazing throughout the commercial areas were able to be standardised to single clear glazing throughout
  • Over 2,400 square meters of R2.00 insulation was able to be removed from the floors of the commercial areas, bringing huge cost savings to the project

How can BCA Energy help?

Combination of Services

In some building designs with commercial floor space and residential class 2 units above, both Section J and BASIX Certification is needed. BCA Energy can supply both services and reduce the need for the client having to deal with multiple consultants.

Design Solutions

The DTS requirements of Section J set a minimum standard and treat each building element in isolation from the other; sometimes placing avoidable restrictions on the design. An alternative solution will in most cases provide for better overall energy efficiency, cost and design solutions of the building. BCA Energy can readily identify these opportunities and have a positive impact on the final design.

Concept Stage Evaluation

By involving us early in the design process, we can offer you expert advice on the initial design concept, highlight areas in the initial design that may pose an issue with DTS compliance, or consult on how a JV3 Alternative Solution may offer you the flexibility and cost savings that we have achieved for many of our clients in the past.

Please contact Padraig Healy within our office on 1300 787 302 or phealy@bcaenergy.com.au if you wish to discuss this further.