Unlocking Energy Efficiency: Optimising Ducted Air Conditioning Running Costs

Ducted air conditioning systems offer superior cooling—that’s a fact. However, homeowners are often concerned about the running costs associated with these systems.

Understanding Ducted Air Conditioning Cost

Ducted air conditioning cost is a valid concern for many homeowners. The cost can vary depending on several factors, including the size of your home, the energy efficiency of your system and your climate. However, by taking steps to optimise your system’s efficiency, you can help keep running costs in check.

1. Choosing the right system

One of the most critical decisions you’ll make regarding your ducted air conditioning system is the initial choice of equipment. Here are some factors to consider:

  • Size matters – Ensure that the system you choose is appropriately sized for your home. An oversized system can lead to inefficiency and higher running costs.
  • Energy efficiency – Energy-efficient systems not only reduce your environmental footprint but also save you money on your energy bills. Check for high energy-efficiency ratings.
  • Zone control – Opt for a system with zoning capabilities. Zoning allows you to cool specific areas of your home, reducing the need to cool unused spaces.

2. Regular maintenance

Regular maintenance is essential to keep your ducted air conditioning system operating efficiently. Take note of these maintenance tasks:

  • Filter replacement – Clean or replace filters regularly to ensure that airflow remains unobstructed. Clogged filters can lead to reduced efficiency.
  • Coil cleaning – Dust and debris can accumulate on the evaporator and condenser coils. Clean them to maintain optimal heat transfer.
  • Duct inspection – Periodically inspect your ducts for leaks or damage. Leaky ducts can cause conditioned air to escape, leading to wasted energy.

3. Thermostat settings

Proper thermostat settings play a significant role in controlling ducted air conditioning costs. Here’s how to optimise your thermostat settings:

  • Programmable thermostat – Get one that allows setting different temperatures for different times of the day. For example, you can raise the temperature when you’re not at home and lower it before you return.
  • Temperature range – Set your thermostat to a comfortable but not excessively cold temperature. Every degree lower increases energy consumption.
  • Nighttime cooling – Make the most of cooler nighttime temperatures. If it’s cool outside, turn off the air conditioning and open windows to allow natural ventilation.

4. Sealing and insulation

A well-sealed and insulated home retains conditioned air more effectively. Here are some tips:

  • Seal leaks – Seal any gaps or cracks around windows, doors and ducts to prevent conditioned air from escaping.
  • Insulation – Ensure your home is adequately insulated, especially in the attic and walls. With proper insulation, your home is cooler in the summer and warmer in the winter.

5. Regular servicing

Annual servicing by a professional technician is essential to keep your ducted air conditioning system running efficiently. A technician can identify and address issues that may lead to increased running costs if left unattended.


Optimising your ducted air conditioning system’s efficiency and reducing running costs aren’t only good for your wallet but also for the environment. With the strategies above, you’ll be able to keep your home comfortable during the hottest months while keeping your energy bills in check.

Efficient cooling doesn’t have to come at a high cost—it’s all about making smart choices and maintaining your system for long-lasting performance.