Key takeaways
- There’s no single heating system that suits every home.
- Reverse-cycle systems combine efficient heating and cooling.
- Ducted systems can provide consistent warmth across larger homes.
- Hydronic heating offers quiet, radiant warmth without blowing air.
- Upfront price doesn’t always reflect long-term running costs.
- Your layout, insulation and heating habits should guide your choice.
What is the best heating system for a home?
There’s no single heating system that will be the best fit for every home. A small household heating one or two rooms has very different needs from a larger family looking for consistent whole-home heating.
The right choice comes down to how you use your space, your local climate, existing infrastructure and whether you want heating only or year-round heating and cooling. Running costs, installation costs and the level of control you want from room to room also matter.
For some homes, an efficient reverse-cycle system makes sense. Others may be better suited to ducted heating or the radiant warmth of hydronic heating. Rather than looking for one universal winner, it’s more useful to compare what each system does well and where it fits best.
How do the main home heating systems compare?
Each heating system delivers warmth differently, so the better option depends on how much of your home you want to heat, the comfort you prefer and whether you also need cooling.
| Heating system | Best suited to | Whole-home heating | Heating & cooling | Upfront cost | Key consideration |
|---|---|---|---|---|---|
| Reverse-cycle split system | Heating individual rooms or smaller areas | Limited | Yes | Lower | Multiple units may be needed for larger homes |
| Ducted reverse cycle | Larger homes and central climate control | Yes | Yes | Higher | Zoning can give you more control over which areas you heat |
| Ducted heating | Homes wanting warm air distributed through ducts | Yes | Depends on system | Moderate to higher | Fuel source and system design affect efficiency and running costs |
| Hydronic heating | Households wanting quiet, radiant warmth | Yes | Generally no | Higher | Installation is easier to accommodate during a build or major renovation |
| Portable electric heater | Occasional heating of a small space | No | No | Lower | Can become costly when used extensively or across several rooms |
These comparisons are a starting point rather than a universal ranking. The size and layout of your home, insulation, existing ductwork and how often you use heating can all change, which option makes the most sense.
Which heating system suits the way you live?
The right heating system should match how you actually use your home, from the number of rooms you heat to the type of comfort you prefer.
You mainly heat one or two rooms
A reverse-cycle split system can be a practical choice when you spend most of your time in a living room, bedroom or another frequently used area. It lets you heat specific spaces without warming the entire house.
You want the whole house heated
A ducted system can distribute warm air throughout multiple rooms from one central unit. Zoning can provide greater control by allowing you to heat selected areas rather than running every zone at once.
You want heating and cooling in one system
Reverse-cycle air conditioning can heat your home in winter and cool it in summer. Depending on your property, this could mean individual split systems or a ducted reverse-cycle system for broader coverage.
You are building or renovating
Building or renovating gives you an opportunity to plan heating around the home from the outset. Ductwork, vents, pipework and equipment locations can be incorporated into the design, opening up options such as ducted or hydronic heating.
You want quiet, radiant warmth
Hydronic heating circulates heated water through radiators or in-floor pipework to provide radiant warmth. With no warm air being blown around the room, it offers a different comfort experience from ducted heating.
You already have a heating system
Existing ductwork, gas connections and equipment can affect what is practical to install. However, replacing an older system doesn’t necessarily mean choosing the same type again. It’s worth comparing the installation, running costs, and comfort of the alternatives.
Which heating system is cheapest to run?
The cheapest heating system depends on more than its purchase price. Installation, energy use, how much of your home you heat and how often you run the system can all affect its long-term cost.
Reverse-cycle split system
Running cost: Generally lower
A reverse-cycle split system can be an economical option when you mainly heat occupied rooms rather than the whole house.
Includes:
- Targeted room heating
- Heating and cooling
- Individual temperature control
Ducted reverse cycle
Running cost: Moderate to higher
Designed for broader home coverage, with running costs influenced by the size of the system, how many zones you use and your temperature settings.
Includes:
- Whole-home coverage
- Heating and cooling
- Zoning options
Gas ducted heating
Running cost: Varies
Gas ducted heating can warm multiple rooms through a central system, but actual running costs depend on gas prices, system efficiency, zoning and how frequently you heat the home.
Includes:
- Central heating
- Multiple-room coverage
- Ducted heat distribution
Hydronic heating
Running cost: Varies by system
Hydronic heating circulates heated water through radiators or in-floor pipework. Its overall cost depends on the heat source, system design and how the home is used.
Includes:
- Radiant warmth
- Whole-home options
- Zoned configurations
Portable electric heating
Running cost: Can be higher with extended use
Portable heaters have a low upfront cost and can suit occasional use in a small area, but regularly heating larger spaces this way can increase energy use.
Includes:
- Low upfront cost
- No fixed installation
- Small-space heating
Gas heater vs split system: which costs less to run?
A reverse-cycle split system can often use less energy to produce the same amount of heat because it transfers heat rather than generating it directly. However, whether it is cheaper to run than gas heating depends on your energy tariffs, system efficiency, and home and heating habits.
How gas heating works
A gas heater burns natural gas or LPG to generate heat. With ducted gas heating, warm air is distributed through ducts and delivered into different rooms through vents or grilles.
How reverse-cycle heating works
A reverse-cycle split system uses a heat pump to transfer heat from outside into your home. The same system can reverse the process in warmer weather, giving you both heating and air conditioning from one unit.
What affects the running cost
Your electricity and gas tariffs are only part of the equation. System efficiency, thermostat settings, insulation, heat loss and how many rooms you heat can all influence your power bills and overall heating costs.
When existing infrastructure matters
If your home already has a gas connection and ductwork, replacing an existing gas ducted heating system may involve different installation requirements from switching from gas to electric. It’s worth comparing both the initial work and ongoing running costs before deciding.
What is the most efficient heating system?
Efficiency depends on how a system produces and distributes heat, as well as how effectively your home retains it.
- Reverse-cycle systems can provide highly efficient electric heating.
- Zoning can reduce energy use in rooms you are not using.
- Insulation and heat loss affect the performance of any system.
Reverse-cycle heat pumps
Reverse-cycle systems transfer heat rather than generating it directly. Available as split or ducted air conditioning, they can provide efficient heating and cooling for your home during warmer months.
Hydronic heating
Hydronic heating circulates heated water through radiators or underfloor pipework. Its efficiency depends on the heat source, system design, and how effectively your home retains the warmth it produces.
Gas heating
Gas heating efficiency varies depending on the type, age and condition of the system. With ducted gas heating, the condition and insulation of the ductwork can also affect how much heat reaches each room.
Portable electric heaters
Portable electric heaters generate heat directly from electricity. They can be practical for occasional use in a small room, but they don’t offer the same heat-pump efficiency as reverse-cycle heating when used extensively.
Whole-home heating: ducted vs hydronic
Both systems can heat multiple rooms, but they deliver warmth differently. Ducted heating uses air distributed through ducts, while hydronic heating circulates heated water through radiators or underfloor pipework.
| Ducted heating | Hydronic heating | |
|---|---|---|
| Heat delivery | Warm air through vents or grilles | Radiant heat from radiators or floors |
| Warm-up | Generally heats spaces quickly | More gradual, sustained warmth |
| Air movement | Uses circulated air | Minimal air movement |
| Noise | Some airflow and system noise | Typically quiet during operation |
| Zoning | Available with suitable systems | Can be configured into heating zones |
| Installation | Requires space for ducting and vents | Requires pipework and radiators or underfloor heating |
| Cooling | Available with ducted reverse cycle | Generally heating only |
| Retrofitting | Depends on roof space and existing ductwork | Can involve more extensive work in an existing home |
Neither option is automatically better for every house. Ducted heating can suit households wanting centralised heating, particularly when heating and cooling are required from one reverse-cycle system. Hydronic heating can suit those who prioritise quiet operation and radiant warmth.
What changes the best heating choice for your house?
Choosing a heating system involves looking beyond the unit itself. These six factors can help narrow down which setup makes sense for your home.
- 01
Consider your home size and layout
A compact home may only need targeted heating, while a larger or multi-room property may benefit from a ducted or zoned system. Open-plan areas and separate living zones can also change how heat needs to be distributed.
- 02
Check your insulation and draughts
Poor insulation, gaps and draughts allow warmth to escape, making any heating system work harder. Improving how well your home retains heat can reduce heat loss and help your chosen system perform more effectively.
- 03
Account for your local climate
Heating needs can vary across NSW. Colder winter conditions, overnight temperatures and seasonal changes all affect how frequently your system runs and the heating capacity your home requires.
- 04
Review existing gas and ductwork
Existing gas connections, ducts and vents may influence what can be installed without major changes. Their age and condition also matter, so existing infrastructure should be assessed rather than automatically reused.
- 05
Factor in solar and electricity use
If your home has solar, an electric heating system may allow you to use more of the electricity generated on site. Your household energy use and when you typically run the heating should also be considered.
- 06
Think about future renovation plans
Planning an extension or major renovation can change your heating requirements. It may also create an opportunity to install new ducting, pipework or a whole-home system while other building work is underway.
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Should you replace your old system like-for-like?
Replacing an ageing heating system is a good opportunity to reconsider what your home actually needs. The system that suited your household years ago may no longer be the most practical option today.
Your heating habits may have changed, you may have added solar or improved your insulation, or you might now want one system for both heating and cooling. Newer zoning and control options can also give you more flexibility over which parts of the house you heat.
If you have an old gas heating system, for example, compare a replacement gas unit with alternatives such as reverse-cycle heating before deciding. Existing ductwork may be reusable in some cases, but its condition and suitability should be assessed first.
Find the right heating system for your home
Not sure whether split, ducted or hydronic heating makes sense for your property? Trimech can assess your home, existing setup and comfort needs to help you compare your options.
Frequently asked questions
Is an oil heater cheaper than a split system?
An oil heater can be cheaper to buy, but that doesn’t necessarily make it cheaper to run. Reverse-cycle split systems use heat-pump technology to transfer heat, which can make them more energy efficient for regular heating.
Is ducted heating expensive to run?
It depends on the type of ducted heating system, the size of your home, zoning, energy prices and how often you use it. Heating fewer zones and reducing heat loss can help limit unnecessary energy use.
Does reverse-cycle heating work in cold weather?
Yes. Reverse-cycle systems are designed to provide heating in cold conditions, although performance varies between models and outdoor temperatures. Choosing a correctly sized system for your local climate is important.
Is hydronic heating worth considering?
Hydronic heating can be worth considering if you value quiet operation, radiant warmth and whole-home heating. Installation can be more involved, particularly when retrofitting an existing house, so the property and project scope matter.
Can solar reduce my heating costs?
Solar can help offset the electricity used by an electric heating system when your panels are generating power. How much you save depends on when you use heating, your solar generation, household electricity demand and energy plan.
Can existing ductwork be reused?
Sometimes. Existing ductwork needs to be checked for its size, layout, condition and compatibility with the new heating system. Older or damaged ducts may need repairs, modifications or replacement before they can be reused.

Find the heating system that suits your home
The best heating system is the one that fits your home, comfort preferences and the way you actually use your space. Upfront price matters, but so do running costs, efficiency, zoning and whether you want heating and cooling from the same system.
Trimech can help you compare split systems, ducted heating, reverse-cycle systems and hydronic heating based on your property and existing setup. Get in touch with our team to find a heating solution that makes sense for your home.
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