The installation costs of ducted central heating typically range from $5,000 to $15,000, depending on the system size, home layout, and additional features.
Installing ducted central heating typically costs between $5,000-$15,000+ in Australia, with complex installations reaching $18,000. The final price depends on your home size, ductwork materials, zoning requirements, and heater efficiency ratings.
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Breaking Down Ducted Heating Installation Costs
The total installation cost combines equipment, ductwork, labor, and additional components. Here’s a detailed cost breakdown:
| Component | Cost Range | Notes |
|---|---|---|
| Heating Unit | $3,000-$8,000 | 14kW-35kW capacity |
| Ductwork Installation | $1,500-$7,000 | 150-350 linear feet |
| Zoning System | $500-$2,500 | Per zone |
| Thermostat | $200-$800 | Smart models cost more |
| Labor | $1,000-$3,000 | 2-3 day installation |
Heating Unit Capacity vs Home Size
- 14kW unit: Covers 130m² ($3,000-$5,000)
- 20kW unit: Covers 185m² ($4,000-$6,500)
- 25kW unit: Covers 230m² ($5,000-$7,500)
- 35kW unit: Covers 325m² ($6,500-$10,000)
Ductwork Material Options & Costs
Your duct material choice impacts performance and installation costs:
1. Flexible Ducting
($7-$36 per linear foot) – Most affordable but prone to airflow restriction. Ideal for tight spaces.
2. Semi-Rigid Ducting
($15-$40 per linear foot) – Zero-leakage system with optimal airflow. Our top recommendation for most homes.
3. Rigid Metal Ducting
($12-$35 per linear foot) – Most durable option. Required for commercial installations.
For comparison, built-in gas heaters typically cost less but lack whole-home coverage.
Key Factors Affecting Installation Costs
Home Characteristics
- Existing ductwork: Retrofitting costs 30-50% less than new installations
- Ceiling height: High ceilings require more powerful units
- Insulation quality: Poor insulation increases system requirements
Installation Complexity
- Single-story vs multi-story: Add $500-$1,500 per additional floor
- Access challenges: Tight crawl spaces increase labor time
- Zoning requirements: Each additional zone adds $500-$2,500
Running Costs & Efficiency Considerations
While installation costs are significant, operational efficiency matters more long-term:
- Gas ducted heating: 11-20c per kWh ($835-$1,250 annually)
- Electric reverse cycle: 30c per kWh ($1,500-$2,200 annually)
- High-efficiency units: 6-8 star ratings cost 15-20% more upfront but save 25-40% in running costs
According to Energy.gov.au, upgrading from a 3-star to 6-star system can cut heating bills by 30%.
Installation Process Timeline
- Day 1: Site assessment & ductwork planning
- Day 2: Duct installation & unit placement
- Day 3: Electrical connections, thermostat setup, testing
Complex installations may require 4-5 days. For smaller solutions, consider indoor propane heaters as temporary alternatives.
Maintenance Costs to Expect
Annual maintenance preserves efficiency and prevents costly repairs:
- Professional servicing: $150-$300 per year
- Filter replacements: $20-$100 annually
- Duct cleaning: $300-$500 every 3-5 years
Proper maintenance extends system life to 15-20 years. Neglect can reduce lifespan to 8-12 years.
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