Ducted Central Heating Installation Costs: Full 2026 Guide
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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.
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
Heating System Upgrade PlannerChoose between a heat pump, a furnace, a boiler or a hybrid with your own numbers, and hire the right installer.Every system compared side by side25 questions for contractors, red flagsRunning-cost, payback and quote calculator (Excel)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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