Air Conditioning Prices in Perth

Air conditioning in Perth starts from $140. A split system supply and install averages $2580. Prices include GST. Most installations include a manufacturer warranty plus installer workmanship guarantee.

Split systems are ideal for cooling one or two rooms and cost $1950–$3400 installed. Ducted systems cool the whole home but cost significantly more. For multiple rooms without ductwork, a multi-split system is a good middle ground.

A standard split system installation takes 3–5 hours. Multi-split systems take 1–2 days. Ducted systems typically require 2–5 days depending on the size of the home and whether new ductwork is needed. Book well ahead of summer for the best availability and pricing.

Running costs depend on the system size, efficiency rating, and usage. A typical split system costs $0.30–$0.80 per hour to run. Higher star ratings and inverter technology significantly reduce running costs. Regular servicing maintains efficiency and keeps running costs down.

As a rough guide: 2–2.5kW for a small bedroom, 3.5–5kW for a living room, and 7–8kW+ for open-plan areas. The correct size depends on room dimensions, ceiling height, insulation, window area, and which direction the room faces. Ask your installer for a heat-load calculation — it takes 15 minutes and prevents costly oversizing or undersizing.

For 1–3 rooms, split systems are almost always better value — lower upfront cost, simpler install, and independent zone control. For 4+ rooms or whole-home cooling, ducted systems become competitive on a per-room basis and offer a cleaner look with no wall-mounted units. Multi-split systems bridge the gap for 2–4 rooms without ductwork.

Standard residential split system installations typically do not need council approval, but strata or body-corporate properties often require written consent for external condenser placement. Heritage-listed properties and some apartment buildings have additional restrictions. Your installer should advise on local requirements before starting work.

A well-maintained split system typically lasts 10–15 years. Ducted systems can last 15–20 years with regular servicing. Coastal and high-use environments shorten lifespan. Signs it is time to replace include rising energy bills, frequent repairs, poor cooling performance, and refrigerant leaks.