Pre-filled for NCC zone 5 (Temperate, 125 W/m²). Covers Sydney, Perth, Adelaide, Newcastle, Wollongong, Canberra (lower altitude). Enter your rooms for an instant cooling load estimate and ducted unit recommendation.
Zone 5 is home to most of Australia's population. The 125 W/m² factor suits mild temperate conditions with warm to hot summers. This is the benchmark zone that most national sizing guides target — a well-insulated 4-bedroom home in Sydney will typically need a 10–14 kW ducted system.
Once you have your total L/s from this calculator, the next step is duct layout design. neuralduct auto-sizes every duct against AS 4254.2 velocity limits, validates the NCC J6 friction rate, and produces a compliant PDF for handover — all in the browser, free to try.