Complete Perth installation guide
Planning a new air conditioner? Use this guide to compare split, multi-split and ducted systems, understand what affects placement and cost, and check that a written quote covers the complete installation.
Malaga-based · servicing Perth homes and businesses · scope and price confirmed in writing
Which system suits the rooms, where each component will go, and exactly what installation work is included.
When your description and photos are enough to scope the work.
Any visit fee is confirmed before attendance and deducted from your invoice if you proceed.
Positions, routes, drainage, electrical work, removal and exclusions.
Start with the decision
A good result depends on the relationship between the selected system, the building, the installation routes and how the occupants will actually use it. The cheapest unit, the largest unit and the shortest-looking pipe route are not automatically the best choices.
This guide explains what should be considered before you accept a quote and what should happen between the first assessment and final handover.
Split, multi-split or ducted
The first decision is not the brand. It is whether you need independent comfort in one room, several separately controlled rooms, or a coordinated whole-home system.
An indoor unit and an outdoor unit condition one room or connected living area. This can be the simplest option where targeted comfort and independent operation matter most.
Several indoor units connect to one compatible outdoor unit. It can reduce the number of outdoor units, but the pipe routes, diversity, capacity and servicing access need deliberate planning.
A central indoor unit distributes conditioned air through ceiling outlets. The roof space, duct layout, return-air path, zoning strategy and likely simultaneous zones all influence performance.
From assessment to handover
The exact sequence changes with the system and property, but the work should move through a clear assessment, installation, testing and handover process.
We start with the rooms or zones you want to condition, how they are used, the building fabric, glazing, insulation, roof access and the performance problems you want the new system to solve.
The system type and capacity are matched to the actual spaces rather than selected from floor area alone. We compare split, multi-split and ducted options where more than one approach is practical.
Indoor and outdoor unit positions, pipework, drainage, duct routes, return air, outlets, controls and electrical cabling are considered together before the installation scope is finalised.
The units and supports are installed, penetrations are sealed, refrigerant pipework and drains are run, and the required circuit, isolation and controls are completed within the agreed scope.
The installation is checked against the selected equipment requirements. Operation, drainage, airflow, controls and the electrical work are tested before handover.
We explain the controller, operating modes, filter access, normal sounds, warranty information and the signs that should prompt a service call rather than guesswork.
Scheduling the work
A straightforward single split can often be completed in one scheduled visit. Multi-split and ducted installations involve more equipment, routes and commissioning, so they may require a full day or more than one day.
The written quote should describe the anticipated work period rather than relying on a generic online estimate.
Indoor units, outdoor units and routes
Placement is a system decision. Moving one component can change airflow, drainage, pipe length, electrical work, appearance, noise at the neighbour and whether the equipment remains serviceable.
Condensate drainage
The indoor coil removes moisture from the air during cooling. That condensate needs a suitable, supported route to an agreed discharge point. The route must suit the selected unit and property rather than being treated as an afterthought.
Poor fall, damaged drainwork, disconnections, blockage or an unsuitable outlet can contribute to water backing up, leaking indoors, staining finishes or creating damp areas. The handover should identify where the drain discharges and what signs warrant investigation.
Electrical and safety planning
Before the job is scoped, the installer needs to establish the selected equipment’s supply requirements and assess the relevant switchboard, protection, circuit route and isolation arrangement.
A new circuit or switchboard upgrade is not automatic for every installation. The requirement depends on the equipment, existing circuits, protection, capacity and condition found at the property.
Does air conditioning need a dedicated circuit? →Price, scope and exclusions
The unit price is only one part of the project. A useful comparison separates the equipment from the labour, materials, electrical work, access and assumptions needed to deliver a complete installation.
Compare the scope, not just the total
A written quote should make the proposed result and its boundaries understandable before equipment is ordered.
Request an installation quoteFor more detail, read what affects air-conditioning installation cost in Perth.
Avoid expensive corrections
A unit can switch on and still be poorly matched to the property. The aim is a system that performs, drains, remains serviceable and does not create a preventable noise, access or electrical problem.
Designed for the actual property
Perth is not one uniform housing type. A coastal apartment, a 1970s tiled-roof home, a new narrow-lot build and a commercial tenancy create different load, access, approval and equipment-placement questions.
Glazing, shading, insulation and room orientation affect peak cooling load. Outdoor-unit positions should consider harsh afternoon sun while maintaining the manufacturer’s required airflow and clearances.
Ducted design depends on workable access, duct routes, return-air position and insulation condition. Low roofs, additions, solar and existing services can narrow the options.
Salt exposure can accelerate deterioration of outdoor equipment and supports. Product selection, location and maintenance should reflect the property’s actual exposure rather than the suburb name alone.
WA noise requirements apply to fixed air-conditioning equipment. Distance, barriers, reflective walls and nearby bedrooms should be considered before an outdoor position is agreed.
External walls, balconies, roofs, risers and common switchboards may be controlled by the strata company. Approval and an agreed equipment route may be needed before installation.
Renovations, previous cooling, solar, pools and kitchen upgrades can produce a circuit history that is not visible from the finished rooms. The relevant supply and protection should be assessed on site.
Real Perth work
These photographs show completed split systems, outdoor equipment, commissioning and ducted roof-space work by the Neighbourhood Electrical & Air team.
These flexible ducts are held up beneath the metal roof. They are not left lying across the ceiling insulation.
The indoor unit and connected ducts need enough room for installation. We also need to reach the unit again for servicing.
This insulated duct connection runs beside an existing brick chimney. We plan the duct path around obstacles already in the roof.
Handover and ongoing care
At handover, you should know how to operate the controller, select heating, cooling and fan modes, access the filters, identify the condensate outlet and recognise when the system is behaving abnormally.
Use a moderate comfortable setpoint rather than forcing the largest possible temperature difference. Australian Government guidance notes that each degree of extra heating in winter or cooling in summer can increase energy use by 5% to 10%.
Existing system on its last legs?
Age alone does not decide it. The fault, overall condition, efficiency, refrigerant, parts availability, repair history, ductwork and whether the existing system still suits the property all matter.
A repair can make sense when the fault is isolated and the wider system remains serviceable. Replacement becomes easier to justify when faults repeat, important parts are unavailable, the system no longer meets the load or the rest of the installation also needs substantial work.
Plan an air-conditioning replacement →Published by Neighbourhood Electrical & Air · Editorial process and corrections
Next content review due 20 February 2027.
Single-room and multi-head reverse-cycle options for Perth homes and businesses.
Whole-home design, zoning, ductwork and installation planning.
Filter, coil, fan and drain care once the system is operating.
Assess whether an older or unreliable system is worth repairing or replacing.
Published and last updated 20 August 2026.
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Send the property, rooms, preferred system and any useful photos. We’ll confirm whether an on-site assessment is the next step.
