Gas heating has been common in Victorian homes for decades. Many households still use ducted gas heating, wall furnaces, gas space heaters, or gas log fires. But more homeowners are now switching to reverse cycle air conditioning — it heats in winter, cools in summer, reduces reliance on gas, and improves year-round comfort.
For Victorian homes, this upgrade can make a lot of sense, especially if your old gas heater is inefficient, expensive to run, or nearing the end of its life. At AA Plus Energy, we help homeowners across Victoria switch from old heating systems to energy-efficient reverse cycle air conditioning with a clear assessment, system recommendation, and professional installation process.
Quick answer: can you replace gas heating with reverse cycle air conditioning?
Yes, many Victorian homes can replace gas heating with reverse cycle air conditioning. Depending on your home, you may be able to replace:
- Gas wall heaters
- Gas space heaters
- Gas ducted heating
- Older electric resistance heaters
- Older inefficient heating and cooling systems
The right replacement may be a single split system, a multi-split system, or a ducted reverse cycle system. The best option depends on your home layout, number of rooms, insulation, existing gas system, electrical capacity, and whether you want room-by-room or whole-home comfort.
What is reverse cycle air conditioning?
Reverse cycle air conditioning is a heat pump system that can both heat and cool your home. In cooling mode, it removes heat from inside your home and transfers it outside. In heating mode, it works in reverse — extracting heat from outdoor air and transferring it inside.
This makes reverse cycle air conditioning different from basic electric heaters. Instead of directly creating heat, it moves heat. That is why a well-selected reverse cycle system can be much more efficient than many older heating options.
For Victorian homeowners, the biggest advantage is simple: one system can provide winter heating and summer cooling.
Why Victorian homeowners are moving away from gas heating
Gas heating only heats. Reverse cycle heats in winter and cools in summer — a more flexible year-round system.
Many older ducted heaters lose efficiency over time, especially when heating rooms you don't regularly use.
Reverse cycle systems can use electricity from your rooftop solar, reducing reliance on grid energy.
A multi-split system lets different rooms be controlled separately — heat only the rooms you actually use.
Replacing old gas heaters reduces risks linked with combustion by-products and carbon monoxide concerns.
Identify your current gas heating system
Before choosing a replacement, you need to know what type of gas heating you currently have.
Ducted gas heating
Central heater connected to ducts and vents throughout the home.
- Multi-split reverse cycle
- Ducted reverse cycle
- Multiple split systems for key zones
Gas wall heater
Installed in one room, heats a specific area.
- Single reverse cycle split system
- Larger split system for main living area
Gas space heater
Standalone heaters for lounges, living areas, or older homes.
- Split system
- Multi-split if other rooms also need heating
Gas log fire
Feature heating for one room.
- Split system
- Multi-split system
- Other electric heating solutions
Ducted gas + evaporative cooling
Common in Victoria — two separate systems.
- Reverse cycle can replace both functions from one system
Decide which rooms actually need heating and cooling
This is one of the most important parts of the switch. You do not always need the same level of heating and cooling in every room. Start with these questions:
- Which rooms do you use every day?
- Which rooms are coldest in winter?
- Which rooms get hottest in summer?
- Do bedrooms need overnight comfort?
- Is the living area open-plan?
- Does the home have a long hallway or two levels?
- Do you want whole-home comfort or zone-by-zone control?
Many Victorian homes only need strong heating and cooling in the living room, kitchen and dining area, main bedroom, children's bedrooms, and home office. A room-by-room plan can prevent you from overspending on rooms you rarely use.
Choose the right reverse cycle system
There are three main ways to replace gas heating.
Option 1
Single split system
Best for one room, one zone, or replacing a gas wall heater or gas space heater.
- Cost-effective
- Fast installation
- Good for targeted comfort
- Simple to use
- Efficient for one room or zone
Option 2
Multi-split system
Multiple indoor units connected to one outdoor unit — ideal for 3–4 bedroom homes.
- One outdoor unit
- Multiple indoor units
- Individual room control
- Efficient zone-based operation
- Replaces ducted gas in key rooms
Option 3
Ducted reverse cycle
Ducts and vents distribute air through the whole home. Best for larger homes.
- Whole-home comfort
- Less visible indoor equipment
- Can include zones
- Heating and cooling from one system
Existing gas ducts may not always be suitable for reverse cycle air conditioning. Duct condition, layout, insulation, airflow, and system design all matter — a professional assessment is important before choosing ducted.
Size the system correctly
Sizing is critical when switching from gas to reverse cycle. A system that is too small may struggle during cold Victorian mornings and evenings. A system that is too large may cost more upfront and run less efficiently. A proper assessment should consider:
- Room size and ceiling height
- Insulation quality
- Window size and direction
- Draughts and open-plan layout
- Number of people in the home
- Which rooms need heating and cooling
- Existing heating system and winter heating demand
This is why AA Plus Energy recommends an in-home assessment before choosing a system.
Check VEU rebate eligibility
Victorian households may be eligible for heating and cooling discounts through the Victorian Energy Upgrades program when replacing older heating systems with approved high-efficiency reverse cycle air conditioners. The official VEU program lists different discount levels depending on what you are replacing and what system is installed.
The final amount depends on:
- Your existing heating system and the new system type
- Product eligibility and installation requirements
- Whether decommissioning is required
- Current VEU program rules
- Whether the provider is eligible to apply the discount
AA Plus Energy can help you check eligibility before installation, so you know what support may be available.
Check your electrical setup
Gas heaters may only need a small electrical connection for fans or ignition, but reverse cycle air conditioners need proper electrical supply. Before installation, your installer should check:
- Switchboard capacity and existing circuits
- Safety switches and outdoor unit location
- Cable run and whether a dedicated circuit is required
- Whether electrical upgrades are needed
This is especially important in older homes. Checking the electrical setup early helps avoid delays, hidden costs, and installation problems.
Plan the installation properly
Good installation matters as much as the system itself. A poor installation can create weak airflow, higher running costs, noise issues, drainage problems, uneven room temperatures, and poor long-term performance.
A good installer will plan indoor unit placement, outdoor unit location, refrigerant pipe run, drainage, electrical connection, noise impact, wall or roof penetrations, and access for future servicing.
- For bedrooms: quiet operation and airflow direction are important
- For living areas: the unit should be placed where air can distribute evenly
- For outdoor units: the installer should consider airflow, noise, access, and neighbour impact
Safely decommission the old gas heater
If you are replacing gas heating, the old unit may need to be disconnected, removed, or decommissioned. This should be handled by qualified professionals. Depending on the system, the process may involve:
- Disconnecting the gas heater and capping the gas line
- Removing the old appliance
- Sealing old flue or wall openings and removing old vents
- Providing compliance documentation and required photos for rebate purposes
Do not attempt to disconnect gas appliances yourself. If your gas heater is the last gas appliance in your home, consider whether fully disconnecting from gas is practical — this depends on whether you still use gas cooking or gas hot water.
Install and commission the new system
Once installed, the system should be tested properly. Commissioning may include:
- Testing heating and cooling modes
- Checking airflow, drainage, and refrigerant lines
- Testing controls and remote operation
- Explaining filters, maintenance, and warranty paperwork
A good handover helps you understand how to use the system efficiently from day one.
Use the system efficiently
After switching from gas, your habits matter. To get the best results:
- Set a comfortable temperature rather than extreme settings
- Keep doors and windows closed while operating
- Use curtains and blinds to reduce heat loss or heat gain
- Clean filters regularly and service the system as recommended
- Heat or cool only the rooms you are using
- Use timers or smart controls where available
- Improve insulation and draught sealing over time
If you have solar panels, consider using heating and cooling during strong solar generation periods where practical.
Common mistakes to avoid when switching from gas
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01
Assuming any split system can replace any gas heater
The correct replacement depends on the size of the space, the existing gas system, home layout, insulation, and electrical capacity. Not every system suits every home.
-
02
Choosing based only on upfront price
The cheapest quote may not include correct system capacity, installation, electrical work, old heater removal, compliance paperwork, rebate handling, or warranty.
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03
Forgetting bedrooms
Some homeowners replace the living area heater but forget bedrooms still need winter comfort. A multi-split system may solve this better than one large living room unit.
-
04
Not checking rebate eligibility early
VEU discounts have rules. The system must be eligible, the provider must be able to apply the discount, and the installation must meet requirements. Check before work begins.
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05
Ignoring insulation and draughts
Even the best reverse cycle system will work harder in a draughty, poorly insulated home. Fixing insulation and draughts can improve comfort and reduce running costs.
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06
Keeping gas supply charges without reviewing other appliances
If heating is the only gas appliance left, ask whether it makes sense to fully move away from gas. If you still have gas cooking or hot water, you may need a longer-term electrification plan.
Benefits of switching from gas to reverse cycle air conditioning
Heating in winter, cooling in summer — from one system.
Modern systems move heat rather than burning fuel inside the home.
Heat and cool only the rooms you use most with split or multi-split systems.
Electric systems work well with rooftop solar during daytime operation.
Reduces concerns linked with indoor combustion from outdated or poorly maintained appliances.
Eligible Victorian households may reduce upfront costs through current VEU-related discounts.
Switching reduces your household's dependence on gas appliances over time.
Why choose AA Plus Energy?
AA Plus Energy helps Victorian homeowners upgrade from old gas heating to energy-efficient reverse cycle air conditioning. The process is designed to make the switch simple:
- Book a free assessment and review your current heating system
- Check your rooms and layout, then get a tailored system recommendation
- Check VEU rebate eligibility before work begins
- Install the system professionally with full commissioning and testing
- Help you understand how to use it efficiently from day one
- Explore hot water heat pump options as part of a broader energy upgrade plan
Whether you are replacing a gas wall heater, ducted gas heating, or planning a broader move toward electric home comfort, AA Plus Energy can help you choose the right path.
Final recommendation
Switching from gas heating to reverse cycle air conditioning can be a smart move for many Victorian homes. The key is to avoid guessing. You need the right system type, correct sizing, proper electrical checks, safe gas decommissioning, and a quality installation.
- A single split system suits one room or one main living area
- A multi-split system suits multiple rooms and zone-by-zone control
- A ducted reverse cycle system suits larger homes and whole-home comfort
AA Plus Energy can assess your home, explain your options, check your rebate eligibility, and install a system designed for year-round comfort.
Thinking about replacing gas heating with reverse cycle air conditioning?
Book a free assessment with AA Plus Energy and find out which system suits your home, what rebates may apply, and how much you could save by upgrading.
Book a free assessment →Frequently asked questions
Can reverse cycle air conditioning fully replace gas heating?
Yes, in many Victorian homes it can. The system must be sized correctly and matched to the home layout, insulation, and heating needs.
Is reverse cycle heating good for Melbourne winters?
Yes. Modern reverse cycle systems are designed for both heating and cooling. The key is choosing the right model and size for Victorian winter conditions.
Should I choose split system or ducted reverse cycle?
A split system is usually best for one room or zone. A multi-split system is better for multiple rooms. Ducted reverse cycle may suit larger homes or homeowners wanting whole-home comfort.
Do I need to remove my old gas heater?
If you are replacing your gas heater, it may need to be disconnected, removed, or decommissioned by qualified professionals. This is especially important for rebate-related upgrades.
Can I get a rebate for replacing gas heating in Victoria?
Eligible Victorian households may receive discounts under the Victorian Energy Upgrades program when replacing certain older heating systems with approved efficient reverse cycle air conditioners. Eligibility and discount amounts depend on current program rules and the installation.
Do I need an electrical upgrade?
Some homes may need a dedicated circuit or switchboard check before installation. This depends on the system size and your existing electrical setup.
How long does installation take?
A single split system may often be installed quickly, while multi-split or ducted systems may take longer depending on the home layout, access, and electrical requirements.
Can AA Plus Energy help with the full process?
Yes. AA Plus Energy can help with assessment, system recommendation, rebate eligibility checks, installation, and handover.