For ducted reverse cycle air conditioning systems, ductwork is crucial to distributing conditioned air throughout your home. Acting as the “air highways,” ducts ensure your system delivers cool or warm air effectively to every room.

However, many homeowners underestimate the importance of well-maintained ductwork. Over time, ducts can leak, gather dust, or lose insulation, resulting in poor airflow, higher energy bills, and reduced comfort. Upgrading your ductwork is vital for meeting modern efficiency standards and maintaining year-round comfort.

Why Replacing Ductwork Is Important

At Melbourne Aircon Specialist, we’re often asked:
"Do I need to replace my ducts when installing a new air conditioner?"

Our answer: Absolutely, yes! Especially if you are switching from an older gas ducted heating system to a modern reverse cycle AC under the Victorian Energy Upgrades (VEU) rebate program.

Here’s why:

1. Eligibility for VEU Rebates

To claim the VEU rebate, ducted reverse cycle systems must use insulation rated at R1.5 or higher. Most older gas heating ducts fall below this standard, resulting in heat loss and reduced performance. Upgrading ensures better efficiency and compliance.

2. Prevent Leaks and Boost Energy Efficiency

Old ductwork often develops leaks and deteriorated seals, allowing air to escape before reaching your rooms. This forces your system to work harder, increasing power consumption. Replacing your ducts ensures tight sealing, better airflow, and lower energy costs.

3. Improve System Performance

Gas heating ducts aren’t always suited to the airflow requirements of reverse cycle AC systems. Installing properly sized and insulated ducts ensures consistent airflow, improving comfort across your home.

Signs You Should Replace Your Ductwork

You may need duct replacement if you notice:

Uneven heating or cooling between rooms
Weak airflow or dusty vents
Unexplained spikes in energy bills
Visible damage, holes, or rust on ducts
Ductwork over 20 years old

These are clear signs that your ducts are outdated and no longer efficient.

Factors Affecting Duct Replacement Cost

The cost of replacing ductwork depends on several factors:

Home size and layout: Larger homes need more ducting and labour.
Duct material: Modern systems use insulated flexible ducts rated R1.5 or higher.
Extent of replacement: Full replacements cost more than partial repairs.
Insulation upgrades: Investing in better insulation lowers future energy bills.
Compliance: Meeting current standards and codes may add to costs.
Number of vents: More vents require additional ductwork.

At Melbourne Aircon Specialist, we include all necessary ductwork upgrades in our quotes, ensuring a seamless installation process.

Why Choose Melbourne Aircon Specialist?

Our skilled team offers:

Detailed duct inspections and expert advice
Installation of compliant ductwork meeting energy efficiency standards
Professional, VEU-approved installations
Improved comfort and reduced running costs year-round

Conclusion

If you’re upgrading from gas ducted heating to a reverse cycle AC, duct replacement is essential. Older ducts often lack proper sealing and insulation, leading to wasted energy and inconsistent airflow.

By replacing outdated ducts with properly insulated, sealed systems, Melbourne Aircon Specialist ensures you enjoy improved comfort, lower energy bills, and eligibility for VEU rebates.

📞 Book your free assessment today and take the first step towards better heating and cooling performance.

FAQs

1. Should I replace ductwork when installing a new AC?
Yes. Replacing ducts ensures compliance with rebates and optimal system performance.

2. Can old gas heating ducts be reused for reverse cycle systems?
No. They are not designed for the airflow and insulation standards required by modern AC systems.

3. Is it worth replacing 20-year-old ductwork?
Absolutely. Older ducts typically leak, lack insulation, and reduce efficiency significantly.

Don’t Overlook It: When and Why to Replace Your Air Conditioner Ductwork