Replacing Gas Ducted Heating: Key Tips for Melbourne 2026

If your gas ducted heater has significantly aged—typically between 15 and 25 years—you may have noticed a range of performance issues. You might find that it requires more time to warm your home effectively, leading to discomfort, especially during colder months. Additionally, you may have observed an increase in your gas bills without any changes to your usage patterns. With the recent news about Victoria‘s shift away from gas systems, questions about how this transition affects your heating situation may arise.

You are certainly not isolated in facing this dilemma. Many homeowners in Melbourne are navigating similar challenges, deliberating whether to repair their current systems, replace them with another gas heater, or switch to electric heating. Given the abundance of conflicting information, it is vital to clarify the current landscape and explore your available options moving forward.

Key Factors Driving the Increase in Gas Ducted System Replacements

Several pivotal factors are converging at this critical juncture.

Foremost, many gas ducted heaters installed during the early 2000s, and even those from the 1990s, are reaching the end of their operational lifespan. These units were originally designed to operate efficiently for 15 to 20 years, and many have now exceeded that expected duration. As these systems age, sourcing replacement parts becomes progressively more difficult, their overall efficiency declines, and ultimately, it often proves more economical to replace them than to continue investing in repairs.

Furthermore, Victoria is actively promoting electrification as part of its energy policy. Starting in January 2024, the state government will ban gas connections in new homes. While this does not necessitate the immediate removal of your existing gas system, it does indicate a clear pivot towards electrification. Additionally, incentives and rebates are increasingly favouring electric systems, while maintaining the gas network is becoming more costly, indicating that your gas bills are likely to keep rising in the future.

Lastly, and perhaps most importantly, the technology surrounding reverse cycle systems has made extraordinary advancements. A decade ago, ducted reverse cycle systems in Melbourne often faced scepticism due to the performance limitations of older models in harsh cold. Fortunately, this perception has shifted dramatically; modern systems now efficiently handle the chill of Melbourne winters without any issues.

Exploring Your Options: Evaluating the Advantages and Disadvantages

When your gas ducted heater begins to exhibit signs of failure, you typically have three potential courses of action to consider.

1. Repair Your Current Heating System

If your heating system is under 15 years old and the problem is relatively minor, such as a malfunctioning fan motor, ignition module, or thermostat, it may be worthwhile to consider a repair. 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 significant safety risk, not just a comfort issue) or if your unit has surpassed the 20-year mark, investing in repairs may lead to further complications later on. Be candid with yourself about the true condition of your system and its remaining lifespan.

2. Upgrade to a New Gas Ducted Heating Unit

Indeed, this option remains viable for homeowners. Existing gas connections can continue to operate—there is no urgent requirement to switch to electric. A new gas ducted heater typically offers greater efficiency compared to older models, and if your current ductwork is in good condition, you may be able to reuse it, which can help keep your costs manageable. However, it is essential to remember that you would be investing in a system that relies on a fuel source that Victoria is progressively moving away from. Gas prices are unlikely to decrease, and potential buyers will increasingly consider running costs when you eventually sell your home. While this choice may not be incorrect for everyone, it is crucial to approach the decision with a comprehensive understanding of the implications.

3. Transitioning to Ducted Reverse Cycle Electric Heating

This option is where most homeowners are heading in 2026, and for good reason. A ducted reverse cycle system provides both heating and cooling from a single unit. This means you can reduce your reliance on gas (or at least decrease your dependence on gas for heating), lower your running costs, and qualify for Victorian Energy Upgrades (VEU) rebates, which can significantly offset your installation expenses. The downside is that the initial investment for this system is generally higher than a straightforward gas replacement, particularly if your existing ductwork requires alteration or replacement. Nevertheless, when you factor in the rebates, the potential for reduced ongoing costs, and the dual functionality of heating and cooling, the financial rationale usually adds up positively over a period of 5 to 7 years.

Navigating the Replacement Process: Comprehensive Step-by-Step Guide

Many individuals seek clarity about what to expect during the replacement process, so here is a general overview of the key stages involved.

• Initial Assessment: A qualified professional visits your home to evaluate your current system, inspect the ductwork, measure the space, and discuss your specific needs. Many installers err by providing quotes based on rough estimates rather than thorough load calculations. If someone provides a quote without taking proper measurements, this should raise a significant red flag.
• Detailed Quote and Planning: You will receive a comprehensive written quote that encompasses the unit, any necessary modifications to the ductwork, electrical work, and the gas disconnection process. This ensures that no surprises arise on the day of installation.
• Installation Day(s): For a straightforward gas-to-gas swap where the existing ductwork is reusable, the process typically takes one day. If you are switching to a full reverse cycle system with new ductwork, expect the installation to last two to three days. Be mindful that you will lack heating during this period, so it is advisable not to schedule it during the coldest months of July.
• System Commissioning: After installation, the system will undergo testing, zoning will be balanced, and you will receive instructions on how to operate the system effectively. While this may seem elementary, many homeowners do not receive proper guidance on how to use their new system, which can lead to confusion later on.

Estimating Replacement Costs: Insightful Overview of Expenses

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

• Gas ducted heater replacement (reusing existing ducts): Expect prices to start around £4,500 and can go up to £7,000 for installation, depending on the unit size and brand.
• Ducted reverse cycle (full installation with new ductwork): Prices generally range from £10,000 to £18,000 or more for an average home in Melbourne. Larger homes, multiple zones, or challenging roof spaces will push costs higher.
• Ducted reverse cycle (using 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 lead to significant 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 assist with the rebate paperwork; if they cannot, it's worth questioning why.

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

Project Timeline: Understanding the Duration of the Entire Process

From your initial call to the moment your system is fully operational:

• Simple gas swap: Typically completed within a week or two after you accept the quote, with a one-day installation timeframe.
• Full reverse cycle changeover: Usually requires two to four weeks for lead time (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 suddenly 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 Discuss with Your Installer for Optimal Results

Not all installers are equal, and in this industry, the quality of installation is as crucial as the equipment used. Here are some important questions to consider asking:

• Have you conducted a heat load calculation for my home? This should not be a guess but a precise calculation. Systems that are undersized won't effectively heat your home, while oversized systems waste energy by cycling on and off.
• Can I reuse my existing ductwork? This can vary. A reputable installer will provide a clear answer based on your specific situation.
• What brand and model are you quoting? It's essential to know exactly what you are getting rather than a vague reference like “a 14kW system.”
• What’s the warranty — on the unit and your installation work? It's vital to differentiate 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 correctly 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 manage the VEU rebate? You shouldn't have to chase paperwork; your installer should handle that for you.

Addressing Common Concerns: Frequently Asked Questions Clarified

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

No, there is no legal requirement mandating the removal of an existing gas ducted heater. You can choose to repair it or replace it with another gas unit. However, it is crucial to consider that Victoria’s energy policy is shifting towards electrification, so think about the long-term implications rather than solely focusing on the present 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 gas 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 designed to operate efficiently even at temperatures significantly lower than those typically encountered in Melbourne. The outdated belief that heat pumps struggle in cold weather stems from older models that lacked capability. Current systems perform exceptionally well—even during those brisk 2°C mornings in July.

How can I determine if my ductwork is reusable?

A qualified installer must physically assess your ductwork. They will evaluate size, condition (ensuring there are no significant leaks, tears, or collapsed sections), and whether the layout suits the new system. Metal ductwork in good condition can often be reused, while older flexible duct that has deteriorated typically requires replacement.

What happens 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 around 60–70% efficiency to a modern reverse cycle system with a Coefficient of Performance (COP) of 4 or better will significantly reduce your running costs. The exact savings will depend on your home, usage patterns, and electricity rates, but most homeowners notice a substantial decrease.

---

If you have an aging gas ducted system and are uncertain about your next steps, connect with Beyond Heating and Cooling. They will assess your current setup and provide honest advice on whether it’s worthwhile to repair or replace—and what the best replacement option is for your home. No pressure, no obligation, just straightforward guidance on what makes the most sense for you.