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Façade Design in the Era of Performance-Driven Compliance

RENYI

Australia’s façade sector is undergoing a structural shift driven by increasingly stringent NCC requirements, tightening energy efficiency targets, and the broader push toward net zero building performance.

As compliance thresholds rise, façade design is no longer resolved at the documentation stage, it is being shaped much earlier through thermal modelling, system selection, and performance verification.

This has elevated the importance of certified façade simulation and building physics expertise, particularly in projects where glazing, framing systems, and envelope detailing must be optimised to meet Section J and BASIX requirements without compromising architectural intent or cost feasibility.

Within this evolving context, specialist consultants such as RENYI Pty Ltd are playing an increasingly technical role in bridging design ambition and regulatory compliance through early-stage façade performance analysis and certified simulation methodologies.

Specialist Façade Simulation and Compliance Expertise

Founded by Allan Ang, RENYI operates at the intersection of sustainable building design, thermal performance simulation, façade optimisation, and NCC compliance.

In 2017, Allan became the first recognised NFRC certified simulator operating in Australia after undertaking intensive training in the United States through the National Fenestration Rating Council programme.

RENYI provides certified thermal performance and façade design advice alongside BASIX and NCC Section J compliance assessments across residential and commercial projects. Accredited in both NFRC and AFRC simulation, the consultancy delivers both international and Australian façade performance modelling, enabling a holistic assessment of building envelopes rather than isolated system components. This integrated capability is increasingly critical as façades shift beyond aesthetics and weatherproofing to become key drivers of energy efficiency, occupant comfort, and long-term building performance.

RENYI has built a strong reputation for delivering highly technical outcomes with a collaborative and responsive approach. “We are able to not only undertake window thermal calculations, but we can also set realistic targets for projects as well,” Allan explained. “We can look at the whole building holistically from a sustainability perspective.”

Early-Stage Façade Optimisation and Specification

Renyi provided technical advice for the facade design of the Macquarie luxury residential development in Sydney CBD, and this occurred before a façade subcontractor had even been engaged. “Façades come with a high level of risk. Consulting with us early in the process allows us to identify potential issues, which can otherwise become very expensive design changes later.” Allan said.

At Harbourside Darling Harbour, RENYI worked closely with the façade subcontractor during the early design phase to optimise window profiles and glazing selections against Section J energy efficiency targets.

“We undertook NFRC thermal calculations and worked out if the proposed system and glass selection would meet the target,” Allan said. “For the windows that didn’t meet the target, we provided improvements to how the window frames should be designed, without blowing the budget.”
That process took approximately three months and involved highly detailed analysis of frame design, glazing systems, thermal breaks, and façade composition. Using years of technical knowledge and simulation experience, Allan is often able to make subtle adjustments that produce significant energy efficiency improvements without forcing major redesigns.

RENYI’s expertise spans major healthcare and residential developments, including the Women’s Hospital in Perth, John Hunter Hospital, 699 Park Street for Mirvac, and current projects across Melrose Park and Rhodes.

As Australia’s construction industry continues pushing toward higher-performing and more sustainable buildings, RENYI is helping project teams bridge the gap between design ambition, compliance, cost, and buildability; ensuring façade systems perform not only for today’s standards, but for the future of the built environment.

For more information contact RENYI, Level 23, 520 Oxford Street, Bondi Junction NSW 2022, phone 02 9316 8882, email info@renyi.com.au, website www.renyi.com.au




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Sustainable by Design: Balancing Ambition, Budget, and Compliance

Renyi guided Norwest Quarter’s sustainability, ensuring energy efficiency, regulatory compliance, and practical, high-performance building outcomes.

Renyi

Renyi, a building performance and energy efficiency consultancy, played a key role in the Norwest Quarter development, one of Sydney’s most ambitious sustainable mixed-use precincts.

Engaged early in the pre-construction phase, Renyi provided technical guidance to ensure the project met and exceeded Australia’s minimum compliance standards, aligning sustainability targets with practical construction constraints.

“We got involved before construction began,” explained Allan Ang, Director at Renyi. “Our scope included providing NatHERS/BASIX certification, NCC Section J and ESD design implementation advice for 181 dwellings over two buildings within the precinct at construction stage, all mandatory energy efficiency requirements under the National Construction Code. We set the performance criteria for the building envelope and service equipment to ensure compliance and efficiency.”

This involved detailed technical calculations to establish benchmarks for everything from air-conditioning systems to tapware efficiency.

“This project had ambitious sustainability targets that went beyond minimum national requirements,” said Allan. “Our job was to align those aspirations with the builder’s practical and financial constraints, helping to achieve the best possible outcomes within budget.”

Striking that balance required careful co-ordination between the developer, builder, and Renyi’s team. “It was a juggling act,” Allan admitted. “There were some areas where we couldn’t compromise, like the building fabric’s thermal performance, but in others, we found smart substitutions, sourcing more cost-effective, water-efficient fixtures that still met high sustainability ratings.”

Renyi’s involvement continued throughout construction, ensuring every trade aligned with the project’s sustainability matrix. “Once the performance parameters were established, our role was to follow through with the builder to make sure all subcontractor works complied,” Allan said. “When unexpected challenges arose, such as availability of materials or system conflicts, we worked closely with the design and construction teams to find compliant, efficient alternatives that didn’t compromise on quality or aesthetics.”

The result is a benchmark in sustainable mixed-use development, demonstrating how collaboration, technical precision, and adaptability can translate lofty sustainability goals into real-world outcomes. “We’re proud of how we managed to balance the expectations of both developer and builder,” said Allan. “Norwest Quarter showcases our ability to go above and beyond minimum standards to help deliver a building that’s genuinely sustainable.”

With Renyi’s guidance, the project not only achieved compliance, it helped redefined it. “It wasn’t a straightforward process,” Allan reflected. “But through true expertise and teamwork, we helped the builder resolve complex service issues and ensure the project met its high-performance aspirations.”

The outcome resulted in 7.8 Star NatHERS/BASIX certification for the project with cost-effective advice to revise the glazing thermal targets.

Renyi partners with clients to achieve Green Star accreditation through the Green Building Council of Australia, as well as NABERS and BASIX certification with NSW Planning—further reinforcing each project’s commitment to sustainability and energy efficiency.

With a focus on collaboration and transparency, Renyi supports clients at every stage of development, helping them achieve superior environmental performance without compromising on quality or functionality. The dedicated Renyi team takes pride in providing personalised service, technical excellence, and ongoing guidance—building strong, lasting partnerships that deliver smarter, greener outcomes.

For Renyi, Norwest Quarter stands as a testament to their philosophy: building smarter, greener, and better.

For more information contact Renyi, Level 23, 520 Oxford Street, Bondi Junction NSW 2022, phone 02 9316 8882, email info@renyi.com.au, website www.renyi.com.au

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