HEATING SERVICES
Ducted Heating Add-On Cooling Melbourne
Add refrigerated cooling to your existing gas ducted heating system for year-round whole-home comfort using a single set of ducts.
5.0
Google Rating
Licensed
Electricians & HVAC
2,500+
Jobs Completed
VEU
Approved Provider
If you already have gas ducted heating, adding refrigerated cooling is one of the most cost-effective ways to achieve whole-home air conditioning. At Polygon BG Air & Electrical, we specialise in add-on cooling installations that connect to your existing ductwork, delivering powerful cooling through the same vents that heat your home in winter.
An add-on cooling system consists of a refrigerated cooling unit (evaporator coil) installed in your roof space alongside your existing gas heater, connected to an outdoor condenser unit. When you switch from heating to cooling mode, cool air is distributed through your existing ducts and vents — no additional ductwork required.
This approach is significantly more affordable than installing a complete ducted reverse-cycle system, as it leverages the ductwork you already have. It's the perfect solution for Melbourne homeowners who want year-round whole-home comfort without the cost of a full new system.
- Uses your existing gas ducted heating ductwork
- Significantly cheaper than a new ducted reverse-cycle system
- Powerful whole-home cooling in summer
- Zone control available for energy efficiency
- Compatible with most existing gas ducted heaters
- Professional installation typically completed in 1-2 days
Need help choosing the right solution?
System Guide
How Add-On Cooling Works
The Add-On Concept
An add-on cooling unit sits beside your gas heater in the roof space. It consists of an evaporator coil connected via refrigerant lines to an outdoor condenser. When cooling is needed, the refrigeration system activates and cool air is pushed through your existing ductwork by the heater's fan — delivering whole-home cooling without any new ducts.
Compatibility Check
Not all gas ducted heating systems are compatible with add-on cooling. Your heater needs to have a suitable fan motor, adequate ductwork capacity and sufficient roof space for the evaporator coil. Our technicians will inspect your current system and advise on compatibility during your free quote.
Sizing & Capacity
The add-on cooling unit needs to be correctly sized for your home — just like a standalone ducted air conditioner. We calculate cooling loads based on floor area, insulation, glazing and orientation to ensure the system delivers adequate cooling on Melbourne's hottest days.
Zone Control Integration
If your existing heating system has zone control, the add-on cooling can often be integrated into the same zones. This means you can cool only the rooms you're using, saving energy and reducing running costs. We can also add zone control if your current system doesn't have it.
Smart Upgrade
Benefits of Add-On Cooling
Cost-Effective
Adding cooling to your existing ducted system costs significantly less than installing a complete new ducted reverse-cycle system.
No New Ductwork
The cooling system uses your existing heating ducts, avoiding the mess and expense of installing new ductwork.
Whole-Home Cooling
Every room connected to your ducted heating system also receives cooling — true whole-home comfort.
Quick Installation
Most add-on cooling installations are completed in just 1-2 days with minimal disruption to your home.
Year-Round Comfort
Combined with your gas ducted heating, you have complete climate control for every season from a single duct system.
Energy Efficient
Modern add-on cooling units feature inverter technology for energy-efficient operation and lower running costs.
Speak with one of our specialists today
Why Us
Why Choose Polygon BG Air & Electrical
Licensed Technicians
Fully licensed and qualified HVAC and electrical professionals you can trust.
Honest Pricing
Transparent quotes with no hidden fees. You'll know exactly what you're paying.
Fast Turnaround
Quick response times and efficient installations to minimise disruption.
Melbourne-Wide Service
Covering all Melbourne metro, inner suburbs and surrounding areas.
HVAC & Electrical In One Place
One team for all your heating, cooling and electrical needs.
Workmanship Guarantee
Every job backed by our workmanship guarantee for your complete peace of mind.
Ready to get started?
Reviews
What Our Customers Say
"Added cooling to our existing Brivis heater. Now we have heating and cooling through the same vents. The installation was quick, neat and much more affordable than we expected. Polygon BG were great."
Derek W.
2 weeks ago
"Best decision we've made. Our house is now comfortable year-round. The cooling is powerful and the team at Polygon BG made the process incredibly easy."
Patricia G.
1 month ago
"Polygon BG checked our existing system, confirmed it was compatible and had the add-on cooling installed in a day. Professional, efficient and reasonably priced."
Simon C.
3 weeks ago
FAQ
Frequently Asked Questions
Add Cooling to Your Ducted Heating
Get whole-home cooling without replacing your entire system. Free quotes from Melbourne's add-on cooling specialists.