Top ducted AC brands for Adelaide: ActronAir (Australian-made in Sydney, designed for harsh Australian climate, excellent hot weather performance, industry-leading warranties 5-10 years, strong local support network, premium pricing +10-20%), Daikin (Japanese engineering, exceptional reliability, whisper-quiet operation 38-45dB, excellent energy efficiency 5-6 stars, comprehensive smart home integration, premium pricing), Mitsubishi Electric (superior build quality, 6-7 star energy ratings, i-save mode reduces running costs 40%, proven 15+ year lifespan, mid-premium pricing), Fujitsu (best value premium option, 6-star efficiency standard, human sensor technology, quiet operation, good warranty 5 years, mid-range pricing), Panasonic (reliable Japanese brand, Nanoe-X air purification, good smart features, competitive pricing), Polyaire (Australian budget brand, basic but functional, shorter warranties 3-5 years, budget-conscious). Choose based on: Adelaide climate conditions (ActronAir excels in extreme heat), energy efficiency (higher stars = lower running costs over 15 years), smart features needed, warranty coverage, installer expertise with brand. Installation quality matters more than brand—poorly installed premium unit underperforms well-installed budget unit.