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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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Sun, Glass and Smart Design

Renyi ensured sustainable, code-compliant design at Newgreens, balancing energy efficiency with architectural vision.

Renyi

As Australia embraces greener urban development, the Newgreens Precinct demonstrates how architectural vision and sustainable engineering can work in harmony.

Playing a central role in that success is Renyi, a Sydney-based consultancy specialising in sustainable building design and performance compliance. Led by Director Allan Ang, Renyi was tasked with ensuring the project met environmental goals without compromising the architectural intent.

“We focus on providing professional design and architectural advice that delivers not only code-compliant solutions but enhances the environmental sustainability and visual value of each project,” says Allan. “Our goal is always to support projects that will contribute to cleaner, greener cities.”

At Newgreens, Renyi’s primary role involved Section J energy efficiency assessments, as outlined in the National Construction Code (NCC). This included evaluating the façade and services systems to ensure code compliance, buildability, and resource efficiency. “Our job was to assess the performance of the façade and the services—like insulation, ventilation, and air conditioning—so that we could provide realistic, code-compliant solutions,” explains Allan.

A standout challenge was the clubhouse, which features a dramatic west-facing glass façade and an articulated butterfly roof. While visually striking, the design posed comfort and performance risks, particularly in Sydney’s harsh afternoon sun.

“The façade was elaborate—mostly glass and west-facing. It created comfort challenges,” Allan said. “We had to carefully assess and apply glazing performance data to meet both thermal comfort requirements and the architect’s design vision.”

The angled roof also complicated insulation and HVAC installation. “The roof wasn’t flat—it was tilted and sculptural. That made it difficult to run services efficiently. We identified those issues early and worked through several iterations to ensure performance standards were met.”

Through thermal calculations and simulation modelling, Renyi proposed energy-efficient yet achievable solutions that aligned with construction requirements and regulatory obligations. Their focus was not just on compliance, but on real-world performance.

“This wasn’t about introducing high-tech systems—it was about getting the fundamentals right,” says Allan. “Section J is about energy efficiency, but the outcome is comfort. It’s about choosing the right materials, so the space doesn’t overheat, and the aircon doesn’t have to work overtime. That’s how you reduce long-term carbon impact.”

Renyi’s contribution extended across the entire precinct, including independent living units and communal facilities. Their approach prioritised early-stage collaboration to align performance requirements across teams.

“There were a lot of meetings and coordination,” Allan recalls. “Each time a new party came on board, it introduced new perspectives—and new challenges. It really highlighted how important it is to engage the right people at the same time to resolve complex design issues.”

Renyi’s strength lies in this collaborative clarity, helping balance client expectations, construction practicality, and environmental ambition. Their role at Newgreens reflects a broader commitment to delivering sustainable building solutions that are both technical and tangible.

“The Newgreens Precinct is architecturally refreshing,” Allan reflects. “The clubhouse is a beautiful building, and it was rewarding to work on the independent living units too—knowing that our input supports thermally comfortable, sustainable homes for older Australians.”

While this wasn’t Renyi’s first aged care or retirement development, it was a standout for its design complexity and layered stakeholder environment. For Allan, the project was a reminder of the power of early integration and honest collaboration.

“We’ve seen how critical it is to involve all consultants early,” explained Allan. “When you do, you save time, reduce rework, and achieve better results.”

Renyi continues to lead with practical, code-informed solutions that champion both comfort and creativity. The Newgreens Precinct stands as a prime example of that mission in action.

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

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