Discover how VURB assessments are transforming compliance and sustainability in Australia's construction sector.
The role of energy modelling in a VURB assessment
Energy modelling stands as the foundation of the VURB (Verification Using a Reference Building) assessment process. Through sophisticated simulation software, project-specific building designs are analysed to predict their operational energy consumption. This modelling enables architects and builders to visualise the energy performance of a proposed design, identify potential inefficiencies, and implement improvements to meet or exceed compliance thresholds under the National Construction Code (NCC).
By integrating energy modelling early in the design phase, stakeholders can make informed decisions on orientation, building envelope, and system specifications, ensuring that sustainability targets are achieved without compromising project objectives. This proactive approach is essential for reducing lifecycle costs and enhancing overall building performance.
How a reference building is constructed and compared in VURB modelling
In the VURB methodology, a reference building is digitally constructed based on the same geometry and space usage as the proposed design, but with strict adherence to minimum NCC Section J requirements. The reference model acts as a compliance benchmark, embodying prescriptive standards for insulation, glazing, HVAC systems, and lighting efficiencies.
The proposed building’s simulated energy consumption is then compared to this benchmark. To pass the VURB assessment, the proposed design must demonstrate equal or lower greenhouse gas emissions than the reference building. This comparative analysis promotes innovation, as project teams can pursue bespoke sustainable solutions while maintaining regulatory compliance.
Documentation and deliverables in a VURB report by Certified Energy
Certified Energy delivers comprehensive VURB reports that include detailed modelling inputs, simulation results, and clear demonstration of compliance or exceedance of NCC energy performance requirements. The report outlines the methodology used, presents comparative data between the proposed and reference buildings, and provides actionable recommendations for further energy efficiency improvements if required.
Standard deliverables also include summary tables, graphical representations of energy use, technical appendices, and an executive summary tailored for regulatory submission. All documentation is prepared to facilitate seamless approval from certifiers and relevant authorities, supporting both project compliance and quality assurance.
What inputs you’ll need (drawings, glazing, insulation, services)
A robust VURB assessment relies on accurate and detailed project documentation. Essential inputs include architectural drawings (plans, elevations, sections), window and glazing schedules specifying U-values and solar heat gain coefficients, insulation specifications for walls, roofs, and floors, and comprehensive mechanical and electrical services documentation.
Additionally, information on lighting systems, occupancy schedules and any renewable energy systems (such as solar PV) must be provided. Early and precise collation of these materials enables efficient modelling and minimises the risk of compliance delays due to missing or incomplete information.
Typical turnaround time and cost for a VURB report in Australia
The turnaround time for a VURB assessment by Certified Energy typically ranges from two to four weeks, depending on project complexity and the availability of required documentation. Rapid project delivery may be possible for straightforward builds or when all necessary inputs are provided promptly.
Costs for VURB reports can vary significantly based on building size, complexity, and the extent of modelling required. As a guide, fees generally start from several thousand dollars for smaller commercial projects, with larger or more intricate developments attracting proportionally higher costs. Engaging Certified Energy early in the design process helps streamline both timelines and budgeting, ensuring compliance objectives are met with minimal disruption to project schedules.
