Quick facts about gas heaters
- Gas heaters are more expensive than electric heaters upfront, but they're cheaper to run long term.
- Heaters typically cost between $400 and $2,200 depending on the type.
- Many states and territories have restrictions regarding how and where you can use gas heaters.
Compare gas heaters
Updated November 19th, 2019
Flued vs unflued gas heaters
Australian gas heaters come in two main types: flued and unflued.
Flued gas heaters
One thing that causes a lot of concern when buying a gas heater is the fear of a room filling up with dangerous fumes and emissions. A flued gas heater solves this problem as it has a pipe that takes gases outside so the air in your room stays clean. Since installation is required, there are extra costs involved, and you won't be able to move your heater from room to room. Many models offer features like a remote control, a programmable timer and child locks, and you can often use an existing fireplace to place your heater and take advantage of the chimney.
- Emissions are directed outside rather than into the room
- Better for spot heating
- Can be used in smaller areas
- Suitable for allergy sufferers, asthmatics and people with respiratory issues
- More expensive
- Require installation which adds more cost
- Not as energy efficient
- Needs gas filter installation
Unflued gas heaters
An unflued gas heater is a portable heater that uses a gas bottle tucked into the back. Most of the gas turns into heat, and it can heat up a room quickly. There are rules around what type of room you can use an unflued heater in, so they are recommended for living areas rather than bedrooms or studies.
Unflued heaters come in two different types:
- Radiant-convection. Cheaper to buy and without as many features, these unflued heaters send heat out into the room from an exposed area. They operate by pressing and holding an ignition button.
- Convection. Most often convection heaters are electronically controlled and come with a remote. They have a thermostat for temperature control and a fan to speed up the movement of hot air.
- Portable so you can take it from room to room
- More energy efficient and cheaper to run
- Heats a room faster
- Some models have safety features
- Puts gas emissions go back into the room, so airflow is crucial
- Illegal to use in small and enclosed spaces
- Produces carbon monoxide and nitrous oxide
- May irritate respiratory issues or allergies
- Can cause condensation
How to compare gas heaters
Unflued heaters tend to cost anywhere between $400 and $1,500, whereas flued heaters range from $400 to $2,200.
Not all gas heaters have the same heating ability, so it's important to understand what you should be looking at when browsing your options. Check out our round-up of the best gas heaters on the market this year for more information.
The heater that you buy should be able to adequately heat the room size that you will keep it in. Since it is illegal to use unflued heaters in smaller rooms, you will need to check the regulations on what is considered a small room in your state. Unflued heaters are better for larger rooms and living areas, but you'll also need to consider the heat output versus the size of the room.
As a guide, you can count on 1kWh being able to heat around 10 square metres (sqm). So if you have a smaller room of around 30sqm, your heater will need 3kWh of heat output to heat the room efficiently. Larger areas of 80sqm will need 8kWh of heat output.
To heat your room faster, look for the highest MJ/h rating in the heaters that are suitable for your room size. Gas is measured in megajoules (MJ), and the higher this number, the more gas will be used for faster heating. Flued heaters have a maximum input of more than 20MJ, and unflued heaters have a maximum input of around 10MJ.
Options for flued gas heaters
If you are specifically looking at flued heaters, consider the following features:
- Remote control
- Electronic ignition
- Child lock
- LPG conversion kit
- Filter-clean warning
Gas vs electric heaters
Deciding on whether a gas or an electric heater is the right choice for your home can be difficult. Check out the main differences between the two so you can find the right solution for your heating needs.
- More expensive but the cost of gas is cheaper than electricity so running costs are lower
- Suitable for large rooms, but need to have good airflow available if buying an unflued model due to emissions
- Work at any time gas is available, so you can still keep warm during power cuts
- Produce less carbon dioxide than electric heaters
- Cost less than gas heaters in general, but electricity costs more for ongoing costs than gas
- Usually smaller and more portable
- Suitable for smaller rooms or if you have children around
Check out our full guide to electric heaters
If you and your family are not sensitive to gas emissions, have larger rooms that you want to heat and don't mind paying a bit extra upfront, a gas heater could be the right choice for you.
Gas heater safety and regulations
- Before purchasing, make sure to check out the gas safety regulations for your state for information around ventilation for gas appliances.
- Victoria has banned the sale of some gas heaters, and unflued heaters must use liquid petroleum gas (LPG).
- Gas heaters should be serviced regularly by a certified gas fitter.
- Check that the heater you want to purchase has been certified for use by the Australian Gas Association.
- To ensure proper airflow, clean filters (if applicable) regularly.
- Ensure kids, pets and any flammable objects stay at least one metre away from gas heaters.
- Do not leave a gas heater on overnight or in a room that you sleep in.
- When choosing a flued gas heater, ask a certified gas fitter to complete the installation.
- As well as having a smoke alarm, consider installing a carbon monoxide alarm for any type of gas heater you purchase.