Replace Gas Ducted Heating With Reverse Cycle: Melbourne Homeowner Guide
Last updated: September 2026
Replace Gas Ducted Heating With Reverse Cycle: Melbourne Homeowner Guide
If your Melbourne home has ducted gas heating, you may be wondering whether it’s time to replace it with ducted reverse-cycle air conditioning.
For many homeowners, the attraction is straightforward: instead of having gas ducted heating for winter and a separate cooling system for summer, reverse cycle can provide whole-home heating and refrigerated cooling from one system.
Victorian households replacing older ducted gas heating may also be eligible for a substantial discount through the Victorian Energy Upgrades (VEU) program, making it an increasingly attractive time to consider switching. The Victorian Government currently lists discounts of up to $5,530 for eligible ducted-gas-to-reverse-cycle upgrades.
But replacing gas heating isn’t as simple as swapping one box for another. Your home’s size, ductwork, electrical requirements, zoning, insulation and heating and cooling needs should all be considered.
At City Wide Air, we help Melbourne homeowners assess their existing gas heating and determine whether ducted reverse cycle is the right replacement for their home.
Quick Answer: Can You Replace Ducted Gas Heating With Reverse Cycle?
Yes. Ducted gas heating can be replaced with an electric ducted reverse-cycle air conditioning system that provides both heating and refrigerated cooling throughout the home.
The existing gas heater is decommissioned and an appropriately sized reverse-cycle system is installed.
Depending on the condition and design of your existing ductwork, some or all of the ducting may also need to be replaced.
The result is a single electric system capable of keeping your home warm during Melbourne’s winter and cool during summer.
What Is Ducted Reverse-Cycle Air Conditioning?
A ducted reverse-cycle air conditioner is an electric system capable of both heating and cooling your home.
In summer, it removes heat from inside the home and transfers it outside.
During winter, the process is reversed. The system extracts heat from the outside air and transfers it inside the home.
Conditioned air is then distributed to different areas through ductwork and ceiling or floor outlets.
Modern systems can also incorporate zoning, allowing you to control which areas of the house receive heating or cooling.
This makes ducted reverse cycle a practical replacement for homeowners who like the whole-home comfort of ducted gas heating but also want refrigerated cooling.
Why Are Melbourne Homeowners Replacing Gas Ducted Heating?
There isn’t one reason that applies to every household.
Some homeowners start considering replacement because their existing gas heater is getting old or requires expensive repairs.
Others want refrigerated cooling added to the home.
And some are looking to reduce their reliance on gas and move towards an all-electric home.
Common reasons include:
replacing an ageing gas heater
gaining refrigerated cooling
combining heating and cooling into one system
reducing reliance on gas
improving energy efficiency
taking advantage of available VEU incentives
using rooftop solar to help offset electricity consumption
adding modern zoning and smart controls
Victoria is actively supporting households moving from gas appliances to efficient electric alternatives, including replacing whole-home ducted gas heating with reverse-cycle heating and cooling.
Will Reverse Cycle Keep My Melbourne Home Warm in Winter?
Yes, provided the system has been properly sized and designed for the home.
Modern reverse-cycle air conditioners are designed to provide both heating and cooling, and Victoria’s VEU program specifically supports eligible high-efficiency reverse-cycle systems as replacements for ducted gas heating.
The important part is choosing the right system.
An installer should consider factors such as:
total floor area
ceiling height
insulation
windows and glazing
orientation
room layout
number of occupants
required zones
ductwork
how the household uses different areas
This is particularly important for Melbourne homes because winter heating demand can be significant.
City Wide Air Installer Advice
Don’t choose a reverse-cycle system simply by matching it to the capacity of your old gas heater.
Your new system should be sized according to your home’s actual heating and cooling requirements.
Can I Reuse My Existing Gas Heating Ducts?
This is one of the most common questions homeowners ask when considering the switch.
Sometimes existing components may be suitable, but you shouldn’t assume your gas-heating ductwork can simply be connected to a new reverse-cycle system.
Reverse-cycle systems have different airflow and duct-design requirements.
Existing ductwork may also be:
incorrectly sized for the new system
poorly insulated
damaged or deteriorated
leaking air
unsuitable for the required airflow
poorly positioned for the new design
Victorian Government guidance says existing ducting may need to be upgraded when installing ducted reverse cycle and recommends replacement as a general rule of thumb when moving from gas to reverse-cycle air conditioning.
City Wide Air can assess the existing ductwork as part of the upgrade and determine what, if anything, is suitable to retain.
What Happens to My Old Gas Heater?
When an eligible ducted gas system is being replaced, the existing heater needs to be appropriately decommissioned as part of the upgrade.
Exactly what’s involved depends on the existing installation and the new system.
City Wide Air can assess the existing equipment and explain the required work before installation begins.
If you’re applying for a VEU discount based on replacing ducted gas heating, the decommissioning of the existing system also forms an important part of the eligibility and evidence requirements.
Do I Have to Disconnect Gas From My Entire House?
No.
Replacing your gas ducted heater doesn’t automatically mean every gas appliance in the house needs to be removed.
You might still have:
gas hot water
a gas cooktop
a gas fireplace
other gas appliances
You can replace your heating first and decide separately whether you eventually want to move the rest of the home to electricity.
For households considering full electrification, heating is simply one part of that transition.
Do I Get Air Conditioning as Well?
Yes — and this is one of the major differences between traditional ducted gas heating and ducted reverse cycle.
Gas ducted heating provides heating.
A reverse-cycle air conditioner provides:
Heating in winter + refrigerated cooling in summer.
This can be particularly attractive for homes currently using ducted gas heating alongside evaporative cooling or separate wall-mounted air conditioners.
Instead of maintaining separate heating and cooling systems, a correctly designed ducted reverse-cycle system can provide both.
What If I Currently Have Gas Heating and Evaporative Cooling?
This is a common configuration in Melbourne homes.
In this situation, homeowners may consider replacing both systems with a single ducted reverse-cycle system.
That can provide:
electric heating
refrigerated cooling
one central control system
zoning options
year-round climate control
Whether this makes sense depends on the condition of your existing systems, home layout and what you want from the new installation.
City Wide Air can assess both existing systems before recommending whether replacement with a single reverse-cycle system is appropriate.
Is Reverse Cycle Cheaper to Run Than Gas Ducted Heating?
It can be.
The Victorian Government currently estimates that an average household replacing ducted gas heating with an efficient reverse-cycle air conditioner could save around $1,140 per year on energy bills.
However, that figure is an estimate rather than a guarantee.
Your actual running costs depend on factors including:
electricity and gas tariffs
system efficiency
house size
insulation
thermostat settings
zoning
hours of use
weather
rooftop solar
how many areas of the home you condition
A well-insulated home using efficient zoning can behave very differently from a poorly insulated home where the entire system runs continuously.
For that reason, City Wide Air recommends looking at the whole home and how the system will be used, rather than relying on a generic running-cost figure.
Does Solar Make Reverse Cycle More Attractive?
It can.
Reverse-cycle heating runs on electricity, so households with rooftop solar may be able to supply some of the system’s electricity consumption from their own solar generation when the system operates during solar-producing hours.
How much solar can contribute depends on:
solar-system size
time of day
weather
household electricity consumption
heating or cooling demand
whether the household has battery storage
Solar shouldn’t be the only reason for choosing reverse cycle, but it can be another consideration when comparing electric heating with gas.
Can I Zone a Ducted Reverse-Cycle System?
Yes.
Modern ducted systems can be divided into different zones.
For example:
Zone 1 — Living & Kitchen
Zone 2 — Master Bedroom
Zone 3 — Other Bedrooms
Zone 4 — Study
This allows you to control which areas receive heating or cooling instead of conditioning the entire home whenever the system operates.
The Victorian Government recommends zoning for ducted systems because it provides greater control and allows individual areas to be heated or cooled rather than the whole house at once.
More advanced systems such as AirTouch can provide additional zone control and smart functionality.
How Much Does It Cost to Replace Gas Ducted Heating With Reverse Cycle?
There isn’t one price that accurately applies to every Melbourne home.
The final cost depends on factors such as:
home size
required system capacity
brand and model
number of outlets
number of zones
ductwork requirements
condition of existing ductwork
electrical requirements
access to the property and roof space
removal and decommissioning of existing equipment
controller and smart-home options
applicable VEU discounts
For this reason, City Wide Air recommends getting a quote based on the actual property and installation requirements rather than choosing a system based on an advertised package price.
Are There Rebates for Replacing Gas Heating in Victoria?
Yes, potentially.
The Victorian Energy Upgrades (VEU) program provides discounts for eligible households replacing older heating equipment with approved high-efficiency reverse-cycle air conditioning.
The Victorian Government currently lists an indicative discount of up to $5,530 for eligible households replacing ducted gas heating with an efficient ducted reverse-cycle system. The exact discount varies according to the system and installation.
To qualify, the new system must meet current VEU requirements.
If you’re replacing an existing heating or cooling system, the system being replaced generally needs to be more than two years old. Eligible residential reverse-cycle systems must also be approved under the program, be high efficiency and carry a minimum five-year warranty.
City Wide Air can help determine whether your proposed upgrade may qualify before installation.
Should I Replace My Gas Heater Before It Breaks?
Not necessarily.
If your current system is operating reliably, the decision to replace it depends on your circumstances.
However, it may be worth planning ahead if:
the system is approaching the end of its useful life
repairs are becoming frequent
you already want refrigerated cooling
you’re renovating
you’re installing solar
you’re planning to electrify your home
you’re considering taking advantage of current VEU incentives
Planning the replacement gives you more time to compare systems and design the installation properly rather than having to make a quick decision after a heater fails during winter.
What Size Reverse-Cycle System Will I Need?
There is no universal system size for a three-, four- or five-bedroom home.
The Victorian Government’s current buyer’s guide suggests approximately 1.1 to 1.4kW of heating output for every 10m² covered by a ducted system, depending on the individual characteristics of the home.
However, this should only be treated as guidance.
A proper system recommendation should consider the property’s:
floor area
ceiling heights
insulation
glazing
orientation
room usage
layout
heating load
cooling load
This is why two similarly sized Melbourne homes may require different systems.
Ducted Reverse Cycle or Multiple Split Systems?
Replacing gas ducted heating doesn’t necessarily mean you must install another ducted system.
Some homes may be better suited to individual split systems or a multi-split configuration.
Ducted Reverse Cycle
May suit homeowners who want:
whole-home heating and cooling
discreet ceiling outlets
centralised controls
zoning
minimal visible indoor equipment
Split or Multi-Split Systems
May suit homes where:
only selected rooms need conditioning
duct installation is difficult
roof space is limited
independent room control is particularly important
The best option depends on the property and how you actually use it.
City Wide Air installs ducted, split and multi-split systems and can compare the options for your home rather than automatically recommending one configuration.
What Should I Ask Before Replacing My Gas Heating?
Before accepting a quote, ask your installer:
What size reverse-cycle system does my home need?
How was that size calculated?
Does my existing ductwork need replacing?
How many zones should I have?
What brand and model are you recommending?
Why does that system suit my home?
What electrical work is required?
What happens to my old gas heater?
Does the quote include decommissioning?
Am I eligible for a VEU discount?
What warranties apply?
How long will installation take?
A good installation quote should make the proposed solution clear rather than simply giving you a model number and total price.
Is Replacing Gas Ducted Heating With Reverse Cycle Worth It?
For many Melbourne homeowners, it’s certainly worth investigating, particularly when an ageing gas heater already needs replacement or the household also wants refrigerated cooling.
The main potential advantages are:
heating and cooling from one system
high-efficiency electric heating
zoning
modern smart controls
reduced reliance on gas
potential VEU incentives
ability to use electricity generated by rooftop solar
However, the right solution depends on the property.
A household that only heats one living room may need a very different solution from a large family wanting whole-home heating and cooling.
The decision should therefore start with what your home actually needs, rather than simply deciding that gas or electric is universally better.
Frequently Asked Questions
Can ducted gas heating be converted to reverse cycle?
Yes. An existing ducted gas heating system can be replaced with electric reverse-cycle heating and cooling. The new system, ductwork and electrical requirements need to be assessed for the property.
Can I use my existing gas heating ducts?
Possibly, but don’t assume they can be reused. Existing ducts need to be assessed for size, condition, insulation and suitability. Victorian Government guidance notes that existing ducting may need upgrading and generally recommends replacing it when moving from gas to reverse cycle.
Does reverse cycle work during Melbourne winters?
Yes. A correctly sized modern reverse-cycle system can provide whole-home heating in Melbourne. System sizing and design are important to ensure it can meet the home’s winter heating requirements.
Will I also get cooling?
Yes. Reverse-cycle air conditioning provides both heating and refrigerated cooling.
Do I need to remove my gas connection?
No. Replacing gas heating doesn’t require you to remove every other gas appliance. You can retain gas for cooking, hot water or other appliances if you choose.
Is there a Victorian rebate for replacing ducted gas heating?
Eligible households may receive a VEU discount when replacing ducted gas heating with an approved high-efficiency reverse-cycle system. Current Victorian Government guidance lists discounts of up to $5,530 depending on the system and upgrade.
How much does gas-to-electric heating conversion cost?
The cost depends on system capacity, home size, ductwork, zoning, electrical requirements, access and VEU eligibility. City Wide Air provides personalised quotes rather than relying on a generic price that may not reflect your installation.
Should I choose ducted or split systems?
It depends on the home. Ducted systems can suit whole-home heating and cooling, while split or multi-split systems may make more sense when only selected areas need conditioning or duct installation is impractical.
Get Advice on Replacing Your Gas Ducted Heating
If you’re considering replacing ducted gas heating, you don’t need to decide on a system before speaking to an installer.
City Wide Air can assess your existing heating, home layout and heating and cooling requirements before recommending an appropriate solution.
We can help you understand:
- room and home size
- heating and cooling requirements
- ceiling heights
- insulation and glazing
- suitable system capacity
- split, multi-split or ducted options
- zoning
- suitable brands and models
- VEU eligibility
- installation requirements
Tell us about your existing gas heating and your home, and we’ll recommend a suitable way to upgrade to reverse-cycle heating and cooling.
Every property is different. VEU eligibility, discounts, energy savings and installation requirements vary according to the existing system, new equipment and property. Contact City Wide Air for advice specific to your home.
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