Gas ducted heating
Gas Ducted Heater Replacement and Changeovers in the Macedon Ranges
Three real options when a gas ducted heater is finished, explained without a sales pitch, installed by our own team and backed by a 9 year labour and workmanship warranty.
Prefer to talk? 1300 369 400
- Like-for-like Brivis or Rinnai gas heaters from factory-trained dealers who buy direct
- Braemar Dominator direct gas heater replacement where it suits
- Whole-home gas to electric upgrade under the VEU program
- Ductwork checked and reused only where it is genuinely suitable
When a gas heater is finished
Gas ducted heaters in the Ranges do a long, hard winter every year. Most give fifteen to twenty years of service. The usual end comes when the heat exchanger cracks, when the heater needs a fan motor and a control board in the same winter, or when it becomes the thing you cannot rely on in July. At that point the decision is not just “which heater” but “which kind of system”, because the options have changed.
We replace gas ducted heaters across the Macedon Ranges from Sunbury and Gisborne to Woodend, Kyneton, Romsey and Lancefield. We install both gas and electric systems, so the advice you get is about your house rather than about what we happen to sell.
Option one: like-for-like gas heater
A new Brivis or Rinnai gas ducted heater, matched to the home’s heat load and connected to the existing flue, gas supply and ductwork where they are suitable. This is the quickest and usually the least expensive path, and for a home with sound ductwork, a good gas connection and separate evaporative cooling it is often the right one.
We size the new heater on the house, not on the badge of the old one. Heaters were often oversized in the past, and a correctly sized modern unit runs longer, quieter cycles and heats more evenly.
Option two: Braemar Dominator direct replacement
The Braemar Dominator is designed by the manufacturer as a direct replacement for a gas ducted heater: an electric reverse cycle unit intended to take the place of the gas heater and, where the existing ductwork and outlets are suitable, connect to them. For some homes it is a sensible middle path between a new gas heater and a full conversion. It is a product-specific approach with its own suitability conditions, and we assess those at the site visit rather than assuming the existing ductwork will do.
Option three: whole-home gas to electric conversion
Replacing the gas heater with a ducted reverse cycle system that heats and cools the whole house, usually with support from the Victorian Energy Upgrades program. In our experience a proper conversion commonly involves removing the gas heater, often removing the evaporative cooler, and installing a new ducted reverse cycle system with new ductwork and new outlets, because the ductwork that served a gas heater is frequently too small, too poorly insulated or laid out wrongly for reverse cycle airflow. That is typical, not universal; where inspection and design confirm the existing ducts are suitable, we reuse them. The full picture is on the gas to electric page and in our guide on reusing gas heating ducts.
How we help you choose
The site visit is where this gets decided. We inspect the heater, flue and gas supply, get into the roof space to look at the ductwork, return air and outlets, ask how the house is used and which rooms matter, and check whether the household is likely to be eligible under the VEU program. Then we put the realistic options in writing with what each includes, so you can compare them properly. If only one option makes sense for your home, we say so.
Why the ductwork decides so much
Whichever option you choose, the ductwork decides whether the new system performs. Crushed or split ducts, missing insulation, an undersized return and outlets in the wrong rooms will make a new heater feel like the old one. For a gas heater the existing ducts are often fine. For reverse cycle they often are not, because the air volume and temperature are different. We do not replace ductwork to pad a quote, and we do not connect new equipment to ductwork that will compromise it. We tell you which it is and why.
The warranty
Our 9 year labour and workmanship warranty covers the installation work on every replacement we do. The heater or reverse cycle unit carries the manufacturer’s product warranty, which we manage for you. If anything we installed is not right, we come back until it is.
What your written quote includes
- A site visit to inspect the existing heater, flue, gas supply, ductwork, return air and outlets
- A written comparison of the options that suit your home: like-for-like gas, Braemar Dominator, or a VEU ducted reverse cycle conversion
- Heater selection and capacity based on the home's heat load, not the old unit's badge
- Removal and disposal of the old heater and any redundant flue or ductwork
- New heater, flue, gas and electrical connections, controller and, where quoted, new ductwork and outlets
- Commissioning, airflow check at every outlet, and a walk-through of the controls
- The 9 year labour and workmanship warranty in writing, alongside the manufacturer's product warranty
We will talk you through the suitable options and explain what changes between them. Quotes describe the scope and the system; they are not itemised.
The new heater
Brivis StarPro, sized for the house
A replacement heater is sized for the home rather than matched to the old model number, because insulation, windows and how the house is used have usually changed since the original was fitted. External or internal, and zoned where it helps.
The ductwork question
Reuse the ducts where they pass, replace them where they do not
On a like-for-like replacement the existing ducts can stay where we have inspected them and they are sound, sized for the new heater and properly insulated. Crushed, split, undersized or uninsulated runs are replaced, and the quote says which is which before the job starts.
Why our installations perform
The MRGA Standard
What a properly designed and installed system includes, and what our quote is built around.
Sized for your home, not a rule of thumb
We size heating and cooling from the home: floor area, ceiling heights, insulation, glazing, orientation and how the rooms are used. An oversized unit short-cycles and an undersized one runs flat out on the coldest and hottest days, which is exactly when you need it.
New, correctly insulated ductwork on every ducted reverse cycle installation
Ducted systems live or die by the ducts. A new ducted reverse cycle installation gets new ductwork, sized for the system's airflow, insulated to the current standard, sealed at every joint and supported so it does not sag or kink in the roof. We do not reuse old gas-heating ductwork for a new ducted reverse cycle system. When a gas ducted heater is replaced like for like, the existing ducts can stay where we have inspected them and they are suitable.
Return air and outlets placed for even comfort
Outlet positions, return-air size and location decide whether the back bedrooms are as comfortable as the living room. We design outlet placement and return air for the floor plan and confirm it with you before installation day.
Zoning and sensors where they help
Zoning lets you heat or cool the rooms you are using. Where a system is zoned we set the zones around how the home is lived in, and place temperature sensors where they read the room rather than a hallway or a draught.
Factory-trained dealers
Trained by the manufacturers, buying direct
We are factory-trained dealers for ActronAir, Brivis and Rinnai and purchase equipment directly from these manufacturers.
We also install, service and repair all major heating and cooling brands.
Brivis manufacturer warranty
Brivis manufacturer warranty on the equipment
Eligible Brivis ducted gas heaters and evaporative coolers carry a five-year parts and labour warranty from Brivis, extendable to nine years in total under Brivis Service Advantage. It applies when we install a new Brivis gas ducted heater, and the conditions are Brivis's:
- Register the product with Brivis within twelve months of purchase
- Keep up the scheduled Brivis services at the intervals Brivis sets
- Some models are excluded, such as the Compact Classic CC3; the terms for your model are confirmed on the quote
Checked against the Brivis Service Advantage page and warranty terms on 15 September 2026. Source: brivis.com.au. This is the manufacturer's warranty on the equipment. Our own 9 Year Labour & Workmanship Warranty covers the installation work and is explained separately below.
Accountability
9Year Labour & Workmanship Warranty
It applies to the installation work our own team does. Equipment is covered by the manufacturer's warranty, repairs and servicing carry their own workmanship warranty, and pre-existing or reused components are not covered by the nine years.
Questions we get asked
Is it worth replacing a gas ducted heater?
If the heat exchanger has failed, the heater is more than fifteen years old and needs major parts, or it has become unreliable through winter, yes. A modern heater is more efficient and quieter, and a failed heat exchanger is a safety issue, not a repair. If the heater is younger and needs a fan or a control board, a repair is usually the better money.
What is the difference between a like-for-like replacement and a VEU upgrade?
A like-for-like replacement puts a new gas heater where the old one was, using the existing flue, gas and ductwork where they are suitable. A VEU upgrade replaces the gas heater with an electric ducted reverse cycle system, which usually means new ductwork and outlets and often the removal of the evaporative cooler. They are different jobs with different costs and different results.
Can the new heater use my old ducts?
For a like-for-like gas heater, often yes, provided the ducts are intact, insulated and sized correctly. For a change to reverse cycle, the existing gas ductwork is frequently unsuitable. We inspect before we quote and tell you either way.
What is the Braemar Dominator?
A Braemar product designed as a direct replacement for a gas ducted heater, using an electric reverse cycle unit that can, where the existing system is suitable, connect to the existing ductwork. It is a product-specific pathway with its own conditions and is not the same as a full ducted reverse cycle conversion.
How long does a replacement take?
A like-for-like gas heater changeover is usually a day. A whole-home conversion to ducted reverse cycle with new ductwork is typically one to two days on site.
Where we work
Gas Ducted Heater Replacement across the Macedon Ranges
Based in Sunbury, servicing the Macedon Ranges and surrounding areas.
Get in touch
Request a written quote
Prefer to talk? Call 1300 369 400, monday to friday 8:00am to 5:00pm, Saturday 9:00am to 1:00pm.


