Replacing Gas Ducted Heating: Key Tips for Melbourne 2026

If your gas ducted heater has reliably served your home for over 15 years—possibly even 20 or 25—you may have started to observe some troubling changes. It could be taking significantly longer to warm your home, or perhaps you’ve noticed a spike in your gas bills despite no alterations in your usage patterns. Moreover, you might be aware that Victoria is transitioning away from gas systems, prompting questions about the implications of this shift for your heating setup.

Rest assured, you are not alone in facing these concerns. Many homeowners in Melbourne are confronted with similar decisions, pondering whether to repair their current systems, replace them with another gas heater, or transition to electric heating. With the vast amount of information available, it is essential to clarify the current landscape and investigate your options as you plan your next steps.

Identifying Key Reasons for the Increase in Gas Ducted Heater Replacements

A variety of significant factors are contributing to the growing trend of gas ducted heater replacements.

First and foremost, a substantial number of gas ducted heaters installed during the early 2000s and even in the 1990s are nearing the end of their operational life spans. These units typically last between 15 to 20 years, and many have already surpassed that timeframe. As they age, finding replacement parts becomes increasingly difficult, their efficiency declines, and ultimately, it may be more economical to invest in a new heater rather than continue to spend on repairs.

Secondly, Victoria is actively promoting the electrification of heating systems. Beginning January 2024, the state government will prohibit new gas connections in newly constructed homes. While this does not necessitate the immediate removal of your existing gas system, it clearly signals the future direction of heating solutions. Furthermore, incentives and rebates increasingly favour electric systems, while the gas network is becoming more expensive to maintain. This trend suggests that your gas bills are likely to keep rising.

Thirdly, and perhaps most notably, there have been remarkable advancements in the technology behind reverse cycle systems. A decade ago, many ducted reverse cycle systems in Melbourne faced scepticism due to older models that struggled to perform adequately in extreme cold. Thankfully, this perception has changed; modern systems now effectively manage the chill of Melbourne winters, delivering reliable heating without the struggles encountered by earlier models.

Evaluating Your Choices: The Advantages and Disadvantages of Each Heating Solution

When your gas ducted heater begins to exhibit signs of failure, you generally have three primary options to consider.

1. Consider Repairing Your Current Heating System

If your heating system is under 15 years old and the issue is relatively minor—such as a malfunctioning fan motor, ignition module, or thermostat—repairing it may be a sensible decision. This could involve a cost of a few hundred dollars and potentially extend the life of your unit for several more years. However, if you discover a cracked heat exchanger (which poses a safety risk as well as a comfort issue), or if your unit has already surpassed the 20-year mark, investing in repairs might lead to further complications down the track. It is essential to accurately assess the true condition and remaining lifespan of your system.

2. Opt for a New Gas Ducted Heating Unit

This option remains a viable choice. Existing gas connections can still function—there is no immediate need to switch to electric heating. A new gas ducted heater will typically offer enhanced efficiency compared to your older model, and if your current ductwork is in good condition, you may be able to reuse it, helping to keep costs down. However, keep in mind that you are investing in a system that relies on a fuel source that Victoria is progressively distancing itself from. Gas prices are unlikely to decrease, and potential buyers will increasingly consider running costs when you decide to sell your home. While this choice may not be incorrect for everyone, it is vital to approach this decision with a thorough understanding of the implications involved.

3. Transition to Ducted Reverse Cycle Electric Heating

This path is where the majority of homeowners are heading by 2026, and for good reason. A ducted reverse cycle system provides both heating and cooling from a single unit. This enables you to reduce your reliance on gas for heating, lower your ongoing costs, and potentially qualify for Victorian Energy Upgrades (VEU) rebates, which can significantly reduce your installation expenses. The downside is that the initial investment for this system is typically higher than for a straightforward gas replacement, especially if your existing ductwork needs modification or replacement. However, when you consider the rebates, lower ongoing costs, and the dual functionality of heating and cooling, the financial benefits often become clear over a period of five to seven years.

Understanding the Replacement Process: A Comprehensive Step-by-Step Guide

Many homeowners seek clarity on what to expect during the replacement process, so here’s an in-depth overview.

• Initial Assessment: A qualified professional will come to your home to evaluate your current system, inspect the ductwork, measure the available space, and discuss your specific needs. Many installers err by providing quotes based on rough estimates instead of conducting thorough load calculations. If someone quotes without precise measurements, consider that a warning sign.
• Detailed Quote and Planning: You will receive a comprehensive written quote that outlines the unit, any necessary modifications to the ductwork, electrical work, and the procedure for disconnecting the gas supply. This proactive approach ensures that no surprises arise on installation day.
• Installation Day(s): For a straightforward gas-to-gas replacement where the existing ductwork can be reused, the process generally takes just one day. However, if you are switching to a complete reverse cycle system with new ductwork, expect the installation to take anywhere from two to three days. Be mindful that you will not have heating during this period, so it is wise not to schedule it for the coldest months of July.
• System Commissioning: After installation, the system will go through rigorous testing, zoning will be balanced, and you will receive guidance on how to operate the system effectively. While this may seem simple, many homeowners do not receive adequate training on how to use their new system, which can lead to confusion down the line.

Evaluating Replacement Costs: A Practical Overview for Homeowners

Cost estimates can vary significantly based on factors such as your home’s size, the extent of ductwork modifications required, and the specific system you choose. However, here’s a realistic price range for Melbourne in 2026.

• Gas ducted heater replacement (using existing ducts): Expect prices starting around $4,500, which can rise to $7,000 for installation, depending on the unit size and brand.
• Ducted reverse cycle (full installation with new ductwork): Prices typically range from $10,000 to $18,000 or higher for an average home in Melbourne. Larger homes with multiple zones or difficult roof spaces will incur higher costs.
• Ducted reverse cycle (utilising existing ductwork where possible): This can cost between $7,500 and $13,000. Not every gas duct layout is suitable for reuse, but when it is, it can result in notable savings.
• VEU rebates can reduce costs by anywhere from $1,000 to $3,000 or more, depending on your system and individual circumstances. Your installer should aid with the rebate paperwork; if they cannot, it is worth questioning their expertise.

These figures serve as general guidelines and may not reflect your unique situation. Each home is different. If you desire a precise estimate tailored to your home, do not hesitate to contact us for a quote— Beyond Heating and Cooling offers this service free of charge.

Project Timeline: Understanding How Long the Entire Process Will Take

From your initial call to when your system becomes operational:

• Simple gas swap: Typically completed within one to two weeks after you accept the quote, with a one-day installation timeframe.
• Full reverse cycle changeover: Usually requires a lead time of two to four weeks (including unit ordering and scheduling), followed by two to three days on-site for installation.
• Peak season (May–July): During these months, everything may take longer as many homeowners in Melbourne realise their heating systems are malfunctioning. If you are reading this in autumn, now is an ideal time to arrange your installation.

Essential Questions to Ask During Your Installer Consultation

Not all installers offer the same quality of service, and in this industry, the quality of installation is just as important as the equipment utilised. Here are some crucial questions to consider asking:

• Have you performed a heat load calculation for my home? This should be a precise calculation rather than a guess. Systems that are undersized will not adequately heat your home, while oversized systems waste energy through frequent cycling.
• Can I reuse my existing ductwork? This can vary. A reputable installer will provide a clear response based on your unique situation.
• What brand and model are you quoting? It’s important to know exactly what you are getting instead of a vague reference like “a 14kW system.”
• What’s the warranty — on the unit and your installation work? It’s vital to distinguish between the manufacturer’s warranty and the warranty provided by the installer.
• Are you licensed to perform gas disconnections? If you are transitioning from gas, a licensed gas fitter must accurately disconnect your old unit. Not every HVAC company can perform this task— Beyond Heating and Cooling can, as our team holds gas fitting licenses in addition to HVAC qualifications.
• Will you handle the VEU rebate? You should not have to chase paperwork; your installer should manage that for you.

Frequently Asked Questions: Addressing Common Concerns

Do I need to replace my gas heater with an electric one?

No, there is currently no law requiring the removal of an existing gas ducted heater. You can opt to repair it or replace it with another gas unit. However, it is essential to recognise that Victoria’s energy policy is evolving towards electrification, so you should contemplate the long-term ramifications rather than just the immediate situation.

Can I keep my gas cooktop if I switch my heating to electric?

Absolutely. Transitioning your heating to a reverse cycle system does not affect your gas cooktop, hot water system, or any other appliances. You can gradually electrify your home if desired, but there is no obligation to convert everything at once.

Is reverse cycle heating adequate for Melbourne winters?

Yes, modern ducted reverse cycle systems are engineered to operate efficiently even in temperatures significantly lower than those typically seen in Melbourne. The outdated belief that heat pumps struggle in cold weather originates from older models that lacked the necessary capability. Current systems perform exceptionally well—even during those brisk 2°C mornings in July.

How can I find out if my ductwork is reusable?

A qualified installer must physically examine your ductwork. They will assess its size, condition (checking for any significant leaks, tears, or collapsed sections), and whether the layout is compatible with the new system. Metal ductwork in good condition can often be reused, while older flexible duct that has deteriorated typically needs replacement.

What will happen to my old gas heater?

Your installer will remove and dispose of your old unit. A licensed gas fitter will properly cap off the gas supply to the unit, so you won’t need to arrange this separately.

Will a new system help reduce my energy bills?

It should, yes. Transitioning from a 20-year-old gas ducted heater operating at approximately 60–70% efficiency to a modern reverse cycle system with a Coefficient of Performance (COP) of 4 or better will significantly lower your running costs. The exact savings depend on your home, usage patterns, and electricity rates, but most homeowners experience a noticeable reduction.

---

If you have an aging gas ducted system and are unsure about your next steps, reach out to Beyond Heating and Cooling. They will evaluate your current setup and provide honest advice on whether it’s better to repair or replace—and what the most suitable replacement option is for your home. No pressure, no obligation, just straightforward guidance tailored to your needs.