Energy Efficiency

The Catalina 10-star NatHERS-rated sustainable home showcases the possibilities of ultra-efficient, all-electric housing. Designed by Solar Dwellings and built by Nulook Homes, the home achieves 105% net zero performance through passive solar design principles, a 10kW PV array with battery storage, EV charging infrastructure and dual-plumbed greywater reuse. Thermal performance is optimised via slab-on-ground construction, high thermal mass (locally sourced recycled bricks and rammed limestone), airtight building fabric and low U-value UPVC windows. Smart zoning and natural cross ventilation reduce the need for mechanical heating or cooling, while intelligent automation systems manage lighting, shading and energy consumption in real time. High-efficiency appliances are installed throughout, including a heat pump hot water system designed to minimise operational energy use. Materials were chosen for low embodied energy, with extensive use of recycled and locally sourced components. The result is a technically impressive, climate-resilient home built for low operational cost and long-term comfort.