Pre-filled for NCC zone 4 (Mixed Dry, 130 W/m²). Covers Mildura, Griffith, Dubbo, Shepparton, Horsham. Enter your rooms for an instant cooling load estimate and ducted unit recommendation.
Zone 4 covers warm inland regions with hot summers and cool winters. At 130 W/m², loads are meaningful in summer but the climate also requires heating capability — reverse-cycle ducted systems with a good heating COP are the standard choice here.
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.