According to AIRAH’s technical manager Phil Wilkinson, there is somewhere between 95 to 98 per cent of all buildings in Australia that are “pre-loved”, that have generally not been designed with sustainability in mind. “In this environment we need a wider understanding of the financial, environmental and social benefits of optimised performance in existing buildings,” Wilkinson says. “This is especially the case as energy, water, indoor air quality and refrigerant emissions considerations become increasingly prominent.”