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