Air Conditioning Installation in Perth 2026, Split System vs Ducted AC Costs, Best Brands, and How to Find a Licensed AC Installer Near You

Air Conditioning Installation in Perth 2026

Perth has a very large air conditioning installation market. Perth's Mediterranean climate, hot dry summers (regularly above 38°C and occasionally above 44°C), creates strong demand for both refrigerative (reverse cycle) and evaporative cooling. All AC electrical work in WA must be performed by a DEMIRS-licensed electrician. demirs.wa.gov.au

How Much Does AC Installation Cost in Perth 2026?

• Split system AC (2.5kW, single room, supply + install), typically $1,220-$2,000 in Perth
• Split system AC (3.5kW, medium room, supply + install), typically $1,420-$2,400 in Perth
• Split system AC (5-6kW, large room, supply + install), typically $1,720-$3,000 in Perth
• Multi-split system (3 indoor units, supply + install), typically $4,900-$8,700 in Perth
• Ducted reverse cycle AC (3-bed home, supply + install), typically $7,600-$14,500 in Perth
• Ducted evaporative cooler (whole home, supply + install), typically $3,200-$6,200 in Perth
• Ducted refrigerative AC (4-5 bed home, supply + install), typically $10,500-$19,500 in Perth

Evaporative vs Refrigerative AC in Perth

Perth's hot dry climate makes evaporative (swamp) coolers highly effective and much cheaper to run than refrigerative AC, evaporative cooling uses approximately 80% less electricity. However, evaporative cooling is ineffective on humid days and cannot heat in winter. Many Perth homes use evaporative cooling for summer and a reverse cycle split system for winter heating. energyrating.gov.au

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