
When it comes to maintaining a comfortable home or workspace year-round, ducted air conditioning is a popular and efficient solution. However, a common question arises: does ducted air con use a lot of electricity? Understanding the factors that influence energy consumption and the benefits of ducted systems can help you make an informed decision about whether this option is right for your space.
Understanding Ducted Air Conditioning Systems
What is a ducted air conditioning system?
A ducted air conditioning system is a whole-home cooling and heating solution that uses a centralised unit to distribute conditioned air through a network of ducts. These ducts are concealed within walls, floors, or ceilings, delivering uniform temperature control across multiple rooms. Its ability to provide discreet, efficient comfort makes it a preferred choice for Australian homes.
How does it work?
The system includes two key components:
- An indoor unit, typically installed in the roof cavity, which houses the fan and cooling mechanisms.
- An outdoor unit, which manages heat exchange and refrigerant circulation.
The system uses a refrigerant to transfer heat, cooling or heating the air before distributing it through the ducts. Modern ducted air conditioning systems often include zoning capabilities, allowing homeowners to control the temperature in specific areas of the home, improving both energy efficiency and comfort.
Factors Affecting Running Costs

Several factors influence the energy consumption of ducted air conditioning systems, including:
- System Size and Cooling Capacity
Larger systems with higher cooling capacities naturally consume more energy, though they are often necessary for bigger homes or spaces. Choosing the right size is crucial to optimise energy efficiency. - Energy Star Rating
A higher energy star rating indicates better energy efficiency, leading to lower running costs over time. Look for systems with advanced inverter technology for optimised performance. - Zoning Capability
Zoning allows you to cool or heat specific areas of your home, reducing energy usage in unused spaces and lowering overall consumption. - Thermostat Temperature
Adjusting the thermostat to a moderate temperature setting, such as 24°C in summer, can significantly reduce energy consumption. - Insulation
Proper insulation helps retain conditioned air, reducing the workload on the system and resulting in lower electricity usage.
Calculating and Reducing Costs
How to calculate your ducted air conditioning costs
- To calculate your ducted air conditioning costs, you need to consider several factors, including the system’s power input, energy consumption, and running hours.
- You can use the kilowatt-hour cost from your recent electricity bill and the system’s energy efficiency rating (EER) to estimate your running costs.
- Regular maintenance and servicing can also help to reduce running costs by ensuring the system operates efficiently.
Tips for reducing your ducted air conditioner bills
- To reduce your ducted air conditioner bills, consider the following tips:
- Use ceiling fans to circulate air and reduce the need for air conditioning.
- Use shade and blinds to block out direct sunlight and reduce heat gain.
- Adjust your thermostat temperature setting to a more moderate level.
- Use zoning to control temperature and airflow in different areas of the building.
- Regularly maintain and service your ducted air conditioning system to ensure optimal performance and efficiency.
Optimizing Your Ducted Air Conditioning System
How to Maintain Your Ducted Air Conditioning System
- To maintain your ducted air conditioning system, consider the following tips:
- Regularly clean and replace filters to ensure optimal airflow and efficiency.
- Check and clean the condenser coils to ensure optimal heat transfer and efficiency.
- Check and replace the thermostat battery to ensure accurate temperature control.
- Regularly inspect and maintain the ductwork to ensure optimal airflow and efficiency.
Choosing the Right System
Calculating and Reducing Running Costs
How to calculate ducted air conditioning costs
To estimate your running costs, you’ll need to know the system’s power input (in kW), your local electricity rate, and how many hours the system runs each day. Use the formula:
Running Cost = Power Input (kW) × Hours Run × Cost per kWh
Regular maintenance is essential to keep the system running efficiently, which can further help minimise costs.
Tips for reducing energy consumption
- Optimise Thermostat Settings: Keep the thermostat at a consistent and moderate temperature to balance comfort and efficiency.
- Leverage Zoning: Use zoning features to cool or heat only the rooms in use.
- Utilise Ceiling Fans: Ceiling fans improve air circulation, reducing the system’s workload.
- Block Heat Sources: Use curtains, blinds, or awnings to prevent heat gain through windows.
- Maintain the System: Clean filters and schedule professional servicing to ensure peak performance.
Benefits of Ducted Air Conditioning

Ducted air conditioning offers numerous benefits that make it an appealing choice for Australian homes and businesses:
- Whole-Home Comfort
With a centralised system, you can maintain a consistent temperature across your entire home, eliminating hot or cold spots. - Energy Efficiency
Modern systems incorporate features like zoning and inverter technology to minimise energy consumption while providing reliable comfort. - Aesthetic Appeal
Unlike split systems, ducted systems are discreet, with vents that blend seamlessly into ceilings or walls. - Quiet Operation
The design of ducted air conditioning systems ensures minimal noise, making them ideal for homes and offices.
Does Ducted Air Con Use a Lot of Electricity?
The answer largely depends on how the system is used and maintained. While ducted air conditioning systems are designed for efficiency, factors like improper use, poor insulation, or outdated technology can increase electricity bills. With the right practices, such as using zoning, maintaining your system, and setting optimal thermostat temperatures, ducted systems can be both cost-effective and environmentally friendly.
Optimise Your Comfort While Saving Energy
Investing in a ducted air conditioning system can provide long-term comfort and efficiency for your home or business. By understanding the factors that affect energy consumption and adopting smart practices, you can enjoy the benefits of this advanced cooling solution without worrying about high running costs.
If you’re considering installing or upgrading your ducted air conditioning system, our team of experts is here to help. With tailored advice, professional installation, and ongoing maintenance services, we’ll ensure your system runs efficiently and effectively.
Contact us today to learn more and take the first step towards a cooler, more energy-efficient home!