1. The number and type of indoor units
Each room or area has its own indoor unit. Concealed ducted units, ceiling cassettes and wall-mounted units are priced differently, and a home with ten conditioned spaces costs more than one with five.
2. The size of the home and the heat load
The outdoor system is sized for the whole home's heating and cooling needs. Orientation, glass, insulation and ceiling heights all affect the capacity needed, which is why we size systems in person rather than over the phone.
3. Pipe runs and access
Long or complex refrigerant pipe runs, multiple levels, and difficult roof or underfloor access all add labour. Planning the system early, while the house is being designed or framed, keeps this under control.
4. Controls
Individual wall controllers in each room, central controllers and app or smart-home integration each add to the cost, and each changes how you'll use the system day to day.
5. Ventilation and fresh air
Many larger homes now include mechanical ventilation or fresh air alongside the air conditioning. It can be designed as part of the same project.
6. Brand and model
Daikin VRV, Fujitsu Airstage VRF and Mitsubishi Electric City Multi systems each have their own range and pricing. How the brands compare →
Comparing quotes
- Check that each quote covers the same number and type of indoor units.
- Ask how the system was sized, and whether the installer has seen the house or the plans.
- Confirm what's included: pipework, drainage, electrical connection, controllers, commissioning and handover.
- Ask who will service the system afterwards.
For a realistic figure for your home, send us your plans or arrange a visit.