How Much Does Ducted Heating Cost In Australia?

Through Trade Heroes, we connect homeowners across Ballarat, the Blue Mountains, Bathurst, Launceston, and every Australian capital with vetted heating specialists who quote transparently and install to manufacturer specifications. The question that drives most winter enquiries on our platform: how much does ducted heating cost? For a standard three to four bedroom house, expect to pay between $4,500 and $9,000 for a new ducted gas heating system fully installed, or $8,000 to $16,000 for a ducted reverse cycle air conditioning system that handles both heating and cooling. But ducted heating cost varies considerably depending on the type of system, the size of your home, and whether existing heating ductwork can be reused. We compiled this guide from 16 months of real installation data across our directory so you can understand the true cost before you commit.

Types Of Ducted Heating Systems

Before we talk numbers, it helps to understand the three main types of ducted heating systems available in Australia. Each works differently, costs differently to run, and suits different climates and house designs.

Gas Ducted Heating

Gas ducted heating is the most common home heating system in Victoria, South Australia, and the ACT, where reticulated natural gas is widely available. A ducted gas heater sits in the roof space or under the floor and draws in air, passes it over a heat exchanger fuelled by natural gas, and pushes warm air through a network of insulated ducts to vents in each room. Most ducted heating systems of this type use a single central heating unit that heats the entire house via zone-controlled outlets. Gas ducted heating systems are effective, responsive, and deliver heated air within minutes of switching on. Brands like Brivis, Braemar, and Rinnai dominate the Australian market. The gas ducted heating cost for a new ducted gas system ranges from $4,500 to $9,000 installed depending on heating capacity and the number of outlets required. Ducted gas heating installation is straightforward in homes with accessible roof cavities and an existing gas meter, which is why gas systems remain the default choice for heating across Melbourne's outer suburbs and regional Victorian towns like Ballarat and Bendigo.

One important consideration: ducted gas heating systems produce greenhouse gas emissions because they burn natural gas. As electricity grids become cleaner across Australia, some homeowners are choosing to move away from gas appliances entirely. Victoria has already banned new gas connections in certain developments from 2024. If you are building new, it is worth considering whether a gas ducted heating system will remain the most cost-effective option over a 15 to 20 year lifespan, or whether electric alternatives make more sense for your circumstances.

Electric Ducted Heating

Electric ducted heating uses a resistive heating element to warm air before distributing it through ductwork. Electric ducted systems are less common than gas because they are significantly more expensive to run in most states. Electric heating systems draw large amounts of electricity, and unless you have a substantial solar array offsetting daytime usage, the annual energy cost can be two to three times higher than running ducted gas heating. That said, electric ducted heating suits homes without a gas connection, particularly in regional areas of New South Wales, Tasmania, and Queensland where reticulated gas is unavailable. Installation costs for electric ducted systems range from $3,500 to $7,000, which is cheaper than gas upfront, but the ducted heating running costs make gas or reverse cycle cheaper over the system's lifetime.

Ducted Reverse Cycle Air Conditioning

Ducted reverse cycle air conditioning is both a heating and cooling system in one. It uses a heat pump to extract warmth from outdoor air and transfer it inside during winter, then reverses the process in summer. Ducted reverse cycle air conditioners are the most energy efficient heating option available because they generate three to five units of heat for every unit of electricity consumed, a ratio measured by the system's energy efficiency rating or coefficient of performance. Brands like Daikin, Mitsubishi Electric, and Fujitsu offer ducted split system heating units with energy star rating labels that make efficiency comparisons straightforward.

The installation costs for ducted reverse cycle heating sit between $8,000 and $16,000, making it the most expensive system to install. But the running costs are substantially lower than gas or electric alternatives in mild to moderate climates. In Launceston, where winter temperatures regularly drop below zero, a ducted reverse cycle system works harder and loses some efficiency. In the Blue Mountains, where temperatures sit between 2 and 8 degrees through winter, reverse cycle heating performs well and keeps energy bills manageable. The decision between gas ducted heating and reverse cycle often comes down to your climate zone, your existing infrastructure, and whether you also need cooling systems for summer.

Average Ducted Heating Installation Costs

Here are the ducted heating installation costs our heating specialist partners quote most often through Trade Heroes. All figures include supply of the heating unit, ductwork, outlets, thermostat, and labour for a standard single-storey three to four bedroom home.

• Gas ducted heating installation: $4,500 to $9,000. Includes the ducted gas heater, flexible heating ducts, ceiling or floor outlets, and connection to existing gas supply by licensed gas fitters. A basic system with 8 to 10 outlets and single-zone control sits at the lower end. A premium system with 12 to 16 outlets, multi-zone control, and variable speed fan technology approaches the upper range.

• Electric ducted heating installation: $3,500 to $7,000. Cheaper to install than gas but more expensive to run. Suits homes without natural gas access.

• Ducted reverse cycle air conditioning installation: $8,000 to $16,000. The higher cost reflects the outdoor compressor unit, refrigerant piping, and the complexity of installing both heating and cooling in a single system. A ducted split system heating setup for a four-bedroom home in Bathurst recently came through our platform at $12,400 installed with a Daikin 14kW inverter unit.

These figures assume accessible roof space for ductwork and a straightforward installation without structural modifications. Homes with limited roof space, cathedral ceilings, or concrete slab floors requiring vertical ducting through walls will attract additional costs of $1,500 to $4,000. If you are replacing an existing system, the cost may be lower because the installer can reuse existing ductwork and outlet locations, reducing both material and labour components. A replacement gas ducted heating system in a home with serviceable ducts typically saves $1,500 to $2,500 compared to a full new installation.

What Factors Affect Ducted Heating Cost?

Several factors determine where your quote lands within those ranges. Understanding them helps you compare gas ducted heating prices and reverse cycle quotes on equal terms.

Home Size And Heating Capacity

The size of your home determines the heating capacity required, measured in kilowatts (kW). A typical three-bedroom home needs 10 to 14kW. A large four to five bedroom home with high ceilings or open-plan living needs 16 to 24kW. Undersizing the unit means the system runs constantly without reaching temperature, driving up energy costs and shortening the unit's lifespan. Oversizing wastes money on a larger unit and ductwork that you did not need. A proper heat load calculation by a qualified installer accounts for ceiling height, insulation levels, window area, and climate zone. Do not accept a quote from any installer who skips this critical step.

Ductwork And Outlet Configuration

If your home has existing ductwork from a previous central heating system, the installer may be able to reuse it, saving $1,500 to $3,000 on the job. However, older homes often have fibreboard heating ducts that have deteriorated, collapsed, or separated at joints. Fibreboard ducts also lack the insulation performance of modern flexible heating ducts, which means heated air loses temperature before reaching the room. Replacing old ductwork with new insulated flexible ducts adds cost but improves system efficiency and ensures every room heating outlet delivers warm air at the correct temperature. The number of outlets also affects pricing. Each additional outlet costs $150 to $300 including the duct run, ceiling diffuser, and individual zone damper.

Energy Efficiency And Running Costs

The upfront ducted heating cost is only part of the equation. Ducted heating running costs over a 15-year system life often exceed the purchase price. A standard gas ducted heating system costs $600 to $1,200 per year to run depending on your home's insulation, your natural gas tariffs, and how many hours per day you operate it. Running ducted gas heating with zone control, so you only heat occupied rooms, can reduce annual energy cost by 30% to 40%. An energy efficient system with a high energy efficiency rating uses less fuel per kilowatt of heat output. Look for units with at least a 4-star energy star rating for gas, or a COP of 3.5 or higher for reverse cycle.

Electric heaters and electric heating systems cost $1,500 to $3,000 per year to run for whole-house heating, which is why most ducted heating systems in Victoria and South Australia use natural gas rather than electricity. Reverse cycle split systems and ducted reverse cycle air units fall between gas and resistive electric, typically costing $500 to $1,000 annually for heating alone. As natural gas tariffs continue to rise faster than electricity in most states, the gap between gas and efficient reverse cycle is narrowing. Many homeowners in Ballarat and Bathurst who installed gas ducted heating a decade ago are now considering switching to reverse cycle air conditioners for their next replacement.

Installation Complexity

A straightforward install ducted heating job in a single-storey home with accessible roof space takes one to two days. Multi-storey homes, homes with flat roofs or limited cavity space, and homes requiring vertical ducting through internal walls are more complex and labour intensive. If the home currently has no gas connection, running a new gas line from the meter to the unit adds $500 to $1,500 depending on distance. Gas fitters must be licensed, and the connection must comply with AS5601 gas installation standards. Ducted heating installation in a two-storey Edwardian home in Ballarat recently came in at $11,200 for a Braemar 6-star gas system with 14 outlets, compared to $6,800 for a similar system in a modern single-storey home with pre-existing ductwork in the same suburb.

Gas Ducted Heating Vs Reverse Cycle: Which Is Better Value?

This is the question we hear most from homeowners replacing an ageing central heating system. The answer depends on where you live and what you value.

In cold climates like Ballarat, Bathurst, and the Blue Mountains where temperatures regularly drop below 5 degrees for weeks at a time, gas ducted heating delivers consistent warmth regardless of outdoor temperature. A gas ducted heater does not lose capacity in extreme cold the way a reverse cycle system can. Gas ducted heating systems also heat a house faster from a cold start, which matters when you get home at 6pm and want the house warm by 6:15. Gas ducted heating prices reflect this reliability, and for homes already connected to natural gas, the running costs remain competitive. The simplicity of gas ducted systems appeals to many homeowners who want a proven heating solution without the complexity of refrigerant-based equipment.

In milder climates and for homes that also need summer cooling, ducted reverse cycle air conditioning offers better long-term value. You get one system for both heating and cooling seasons, and the energy efficient heating units in modern reverse cycle systems produce far fewer greenhouse gas emissions than burning natural gas. The ducted heating unit offers both comfort and environmental benefit. For a home in Sydney's inner west, one of our installers calculated that a $13,500 ducted reverse cycle system would cost $4,200 less to run over 10 years compared to a $7,000 gas ducted system plus a separate ducted air conditioning unit for summer.

How To Reduce Ducted Heating Running Costs

Whether you choose gas, electric, or reverse cycle, these strategies reduce your heating running costs without sacrificing comfort. We have seen homeowners cut their winter energy bills by 30% to 50% simply by addressing these factors before or after installation.

• Use zone control to heat only occupied rooms. Most ducted heating systems allow individual zones to be opened or closed. Heating the whole house when you only use three rooms wastes 30% to 50% of your energy.

• Set the thermostat to 18 to 20 degrees rather than 22 to 24. Every degree above 20 adds approximately 10% to your energy bills.

• Seal gaps around doors, windows, and where ducting penetrates ceilings. Air leakage forces the system to run ducted heating systems longer to maintain temperature.

• Insulate your ceiling to at least R4.0 in climate zones 6 and 7. Insulation is the single biggest factor in how efficiently any heating system performs.

• Service the system annually. A dirty filter or blocked duct reduces airflow and forces the unit to work harder, increasing running costs by 15% to 25%. For gas systems, an annual service by licensed gas fitters also checks the heat exchanger for cracks that can leak carbon monoxide into the home.

Frequently Asked Questions

Below are the questions homeowners ask us most often when planning a ducted heating installation through Trade Heroes.

How Much Does Ducted Gas Heating Cost To Run?

The gas heating cost to run a standard ducted system depends on your home size, insulation level, thermostat setting, and local natural gas tariffs. For a well-insulated three-bedroom home in Melbourne or Adelaide, expect $600 to $900 per year. Poorly insulated homes or larger properties can reach $1,200 to $1,800 annually. Running ducted gas heating with zone control significantly reduces costs by limiting heated air delivery to occupied rooms only.

Can You Install Ducted Heating In An Existing Home?

Yes. Most ducted heating systems can be retrofitted into existing homes provided there is adequate roof space or underfloor access for ductwork. Single-storey homes with accessible roof cavities are the simplest to retrofit. Two-storey homes and homes with flat roofs may need vertical ducting through walls or bulkheads, which adds to installation costs. Underfloor ducting is an alternative in homes with raised timber floors, which is common in older homes across Launceston and regional Victoria. A qualified installer will assess your home and recommend the best approach for your room heating needs based on your existing structure and layout.

What Is The Most Energy Efficient Ducted Heating Option?

Ducted reverse cycle heating is the most energy efficient option available, delivering three to five times more heat energy than the electricity it consumes. Among gas options, look for energy efficient heating units with a 5 or 6 star rating from brands like Brivis Supernova or Braemar Ecostar. An energy efficient system costs more upfront but reduces annual energy cost substantially over its 15 to 20 year lifespan. The right heating options for your home depend on climate, existing infrastructure, and whether you also need cooling. If you are unsure which system suits your property, request quotes for both gas ducted and reverse cycle through our directory and ask each installer to provide a 10-year running cost estimate alongside the installation quote. That comparison makes the long-term value clear.

Get Accurate Ducted Heating Quotes Through Trade Heroes

We are a directory of vetted, insured heating specialists across every Australian state and regional area. Whether you need to install ducted heating in a new build in Bathurst, replace an ageing gas ducted system in Ballarat, or upgrade to ducted reverse cycle air conditioning in the Blue Mountains, Trade Heroes connects you with experienced professionals who understand your climate zone and deliver installations that run efficiently for decades. Every specialist listed on our platform has been background checked, holds the relevant trade licences, and has been reviewed by real homeowners who have used their services for ducted heating projects.

Request your free quotes today and get accurate pricing for your ducted heating project from specialists who know the difference between a system that performs and one that disappoints. Every specialist on our platform holds the relevant licences for gas fitting and refrigerant handling, carries public liability insurance, and has been reviewed by real homeowners. It takes less than two minutes to submit your home details and start receiving obligation-free quotes.