The single biggest factor in this heater buying guide Australia is running cost, and the answer is clear: a reverse-cycle air conditioner is the cheapest heater to run in every state. All plug-in electric heaters cost roughly the same per hour, so choose by room size, portability and how long you'll heat the space each day.
Why does a reverse-cycle heater cost so much less to run?
A plug-in electric heater turns one kilowatt of electricity into one kilowatt of heat. That sounds efficient, but it's the floor, not the ceiling.
A reverse-cycle air conditioner doesn't make heat, it moves it. For every kilowatt of electricity it draws, it can pump roughly three or more kilowatts of warmth in from the outside air.
With typical Australian electricity around 25 to 35 cents per kilowatt-hour, that difference adds up fast over a winter. Over a season, plug-in heaters can cost noticeably more than a reverse-cycle split system delivering the same warmth to the same room.
Do panel, fan and oil column heaters really cost the same?
Underneath, a panel heater, a fan heater, an oil column heater and an old bar heater are the same machine: a heating element that converts electricity straight into heat. At the same wattage, they cost the same amount per hour to run.
Oil column heaters edge ahead on efficiency, but only by a whisker, because they hold and radiate heat gently after the element cycles off. What actually changes your bill is the wattage you buy and how many hours you run it, not the badge on the box.
So the real question isn't which plug-in heater is cheapest, it's whether the room suits a plug-in heater at all, or whether a fixed reverse-cycle unit will pay for itself.
What are the main heater types, and who suits each?
Browse a broad home appliances range and you'll see four heating styles dominate Australian homes. Each earns its place in a different situation.
Fan heaters
Small, cheap and fast. A fan heater fills a bathroom or bedroom with warmth in minutes, making it ideal for a quick blast while you get ready. The trade-off is noise and a lack of stored heat once it's switched off.
Panel heaters
Slim, quiet and often wall-mountable, panel heaters suit bedrooms and studies where you want steady background warmth without a bulky unit. They warm the air gently rather than blasting it.
Oil column heaters
The workhorse for lounge rooms and open areas you occupy for hours. They're slow to warm up but hold heat well, and with no fan they run near silently, which many people prefer for sleeping.
Reverse-cycle air conditioners
The cheapest to run and the best choice if you heat a main living area every day through winter. The catch is the upfront cost and installation, so they make most sense for owners and for rooms used constantly.
How do the heater types compare?
Use the table below to match a heater to your room and habits. Running-cost ratings are relative, comparing plug-in heaters against a reverse-cycle system delivering the same warmth.
| Heater type | Best for | Heat speed | Running cost | Noise |
|---|---|---|---|---|
| Fan heater | Bathrooms, quick warm-ups | Very fast | Higher | Noisy |
| Panel heater | Bedrooms, studies | Moderate | Higher | Silent |
| Oil column | Lounge rooms, long sessions | Slow | Higher (marginally best of the plug-ins) | Silent |
| Reverse-cycle | Daily main-room heating | Fast | Lowest | Quiet |
Which heater should you actually buy?
If you rent, or only heat a room now and then, a plug-in heater is the sensible call. Pick a fan heater for speedy bathroom warmth, or an oil column for quiet, long-session comfort in the lounge.
If you own your home and heat a living area every single day, a reverse-cycle unit will almost always be cheaper over its life, even after installation. The daily savings compound through every cold month.
Whatever you choose, size it to the room. An underpowered heater runs flat out and still leaves you cold, while an oversized one wastes energy heating space you don't use.
How do you cut heating costs whatever heater you own?
The cheapest heat is the heat you don't lose. A few habits make a bigger dent in your bill than swapping heater brands.
- Heat only the rooms you're using and close doors to contain the warmth.
- Block draughts under doors and around windows so warm air stays put.
- Drop the thermostat a degree or two; each degree noticeably trims running costs.
- Run heaters on a timer rather than all night, and rug up with a throw before reaching for the dial.
- Let winter sun in during the day, then close curtains at dusk to trap the warmth.
A warm home is a whole-house project. While you're sorting winter comfort, it's worth refreshing the wider home and living essentials that make cold evenings cosier, from soft furnishings to gentle ambient lighting like these rechargeable dimmable wall sconces that add warmth to a room without any wiring. And a cosy winter kitchen runs on more than the heater, so a durable set like the Snapware Pyrex glass container set keeps warming soups and slow-cooked meals ready to reheat on the coldest nights.
The bottom line on choosing a heater
For the lowest running cost, a reverse-cycle air conditioner wins outright thanks to heat-pump efficiency. If that's not an option, all plug-in electric heaters cost much the same to run, so pick the format that fits your room, then focus on sealing draughts and heating smart to keep the bills down all winter.
Frequently asked questions
What is the cheapest heater to run in Australia?
A reverse-cycle air conditioner is the cheapest heater to run in every Australian state. Because it moves heat rather than generating it, it delivers around three or more kilowatts of warmth for each kilowatt of electricity, making it far cheaper over a winter than any plug-in electric heater providing the same heat.
Do oil column heaters use less electricity than fan heaters?
Only marginally. At the same wattage, oil column, fan and panel heaters all convert electricity into heat at the same rate and cost the same per hour. Oil columns feel slightly more efficient because they radiate stored heat gently after the element cycles off, but the difference is very small.
Is a 2000W heater expensive to run?
A 2000W heater draws 2 kilowatts, so at roughly 25 to 35 cents per kilowatt-hour it costs around 50 to 70 cents an hour to run. Used for several hours daily across winter, that adds up. Running it on a timer and heating only occupied rooms keeps the cost in check.
Should renters buy a portable heater or ask for reverse-cycle?
Renters usually can't install fixed heating, so a portable heater is the practical choice. Pick a fan heater for fast bathroom warmth or an oil column for quiet lounge-room comfort. Choose one sized to the room, use a timer, and block draughts to get the most warmth per dollar.
