Key takeaways
- A back-to-back split-system installation is a different job from a multi-room or ducted installation.
- The electrical circuit, switchboard and cable route should be included in the scope before installation day.
- A site assessment makes quotes easier to compare because it identifies access, removal and installation requirements.
What changes the installation cost?
A single split system normally has fewer components and a shorter installation path than a multi-head or ducted system. The required capacity also depends on the room, insulation, windows, orientation and how the space is used. Choosing a unit only by floor area can result in an unsuitable recommendation.
A back-to-back layout may reduce labour and materials. A longer pipe run, difficult wall access, a roof-space route or a high external wall can add installation work. The outdoor unit also needs a practical location with suitable clearances and drainage.
Why the electrical scope matters
The installer needs to confirm that the existing circuit, switchboard and cable route are suitable. Some installations need a new circuit or switchboard work. That should be identified in the quote rather than appearing as an unexpected extra on installation day.
Replacing an existing unit can also involve isolating, removing and disposing of old equipment. Ask whether removal, drainage, commissioning and certification are included.
What should a useful quote include?
Ask for the model and capacity of the proposed system, the indoor and outdoor unit locations, the approximate pipe and cable route, electrical work, drainage, commissioning, removal of old equipment if applicable and any exclusions. A good quote makes it clear what is included before you accept it.
The cheapest headline number is not always the lowest total cost. A quote that leaves out electrical work, access requirements or commissioning can be difficult to compare with a more complete scope.
When should you book an assessment?
Book an assessment when you are unsure which system suits the property, when more than one room is involved, when the switchboard is older or when the proposed outdoor unit has limited access. An electrician can assess the installation path and electrical requirements before the next step is priced.
Frequently asked questions
Does every air conditioning installation need a new circuit?
Not every installation has the same electrical requirements. The existing circuit, switchboard, system and installation conditions should be assessed before the electrical scope is confirmed.
What should an air conditioning quote include?
It should identify the proposed system, indoor and outdoor unit locations, pipe and cable route, electrical work, drainage, commissioning, removal if applicable and any exclusions.