Patio heaters are simple machines. Gas or electric, they do one job: warm the people near them. Almost all of the trouble they cause traces back to the same short list of mistakes, and every one of those mistakes is avoidable.
This is not a scare piece. Used properly, a patio heater is a safe and genuinely useful thing to own through an Australian winter. What follows is the plain version of what "used properly" means.
One thing before the list. Your heater's manual outranks this article. Models differ, and the manufacturer's instructions for your specific unit are the final word on clearances, ventilation and use. Where anything here seems to conflict with your manual, the manual wins.
Know which type you own
Gas and electric heaters carry different risks, so it pays to be clear about what is standing in your backyard.
A gas patio heater burns LPG from a bottle. That means a real flame, hot surfaces and combustion gases. It needs fresh air, sensible clearances and a bit of routine attention to the bottle and hose.
An electric heater has no flame and no gas. Its risks are the hot element, whatever is too close to it, and electricity outdoors. Keep plugs and connections dry, use it only as the manufacturer intends, and do not run it through damaged leads or piggybacked powerboards.
Neither type is safer in every situation. They are just safe in different ways, and the rules below cover both.
Clearance is the rule that matters most
Heat needs empty space around it. Most heater incidents start with something flammable sitting closer than it should: an umbrella canopy, a shade sail, an awning, outdoor curtains, a privacy screen, an overhanging branch, a stack of cushions.
Your manual states minimum distances for your model. Measure them once and you will hold the picture in your head forever. Pay particular attention to the space above a mushroom-style gas heater, because most of its heat rises, and the canopy of an umbrella can end up directly in that stream without anyone noticing.
If the heater only fits in your space by crowding something combustible, it is the wrong heater for that spot. Move the heater, move the furniture, or choose a different type. Wall or ceiling mounted electric units exist partly to solve exactly this problem. If that is the direction you are leaning, our guide to sizing and placing electric outdoor heaters in an alfresco ceiling covers mounting heights and where the licensed-electrician line sits.
Gas heaters need fresh air, full stop
Burning gas consumes oxygen and produces combustion gases, including carbon monoxide if the burn is incomplete. That is why gas patio heaters are outdoor appliances. Enclosed rooms, garages, and zipped-up gazebos are not outdoor spaces, even if they feel like it on a cold night.
Covered areas with open sides sit in a grey zone that only your manual can rule on. Some units are approved for use under high, well-ventilated roofs. Some are not. Check before you assume. Solid-fuel appliances are a separate case again: a wood heater or wood-fired oven vents through a flue, and our guide to flue flashing and roof penetrations explains what that install involves and who should carry it out.
If you ever smell gas, turn the heater off at the bottle and give it time to clear before investigating. A brush of soapy water over hoses and connections is a simple, widely used way to find a leak: bubbles mean gas is escaping. Never search for a leak with a flame.
Stable footing beats a fast reaction
A heater that cannot tip over is safer than any amount of quick thinking after it does. Put freestanding heaters on level, solid ground. If the base is designed to be weighted with sand or water, fill it. Keep heaters out of walkways and away from the spots where kids and dogs run, and route any power lead where nobody will catch a foot on it.
Wind deserves respect too. A strong gust can push a tall heater around, and it plays havoc with a gas flame. On genuinely windy nights, the sensible move is often to not bother. Many modern heaters include tilt switches that cut the gas or power if the unit tips. Treat that as a backstop, not a plan.
Look after the gas bottle
The bottle is the part people forget about. A few habits keep it boring, which is exactly what you want.
- Store bottles upright, outdoors, away from heat sources and out of direct hot sun where practical.
- Check the hose now and then for cracking or perishing, and replace it if it looks tired.
- Make connections hand-tight and test with soapy water after swapping bottles.
- Swap bottles in the open air, never in a shed or garage.
- Turn the bottle off at the valve when the night ends, not just the heater.
The habits that prevent nearly everything
Most of patio heater safety is not equipment. It is routine.
- Never leave a running heater unattended. Going to bed or heading out counts.
- Keep children and pets clear. The guard on a heater is hot, and a wagging tail has no sense of clearance.
- Do not dry clothes or towels on or near a heater. It is an old habit from indoor heaters and a bad one outdoors too.
- Let everything cool completely before covering the heater or wheeling it away.
- Give the unit a clean and a once-over each season, following the manual, so spiders, dust and corrosion never get a head start.
That is the whole discipline. Space around it, air for it, solid ground under it, and a person paying attention.
If you are still choosing a heater, or replacing one that has done its time, our heating collection covers electric and gas options, and the broader heating and fire range includes firepits if you are weighing up that direction instead. Buy the one that fits the space you actually have, read the manual once, and it will give you years of warm evenings without drama.
