With Western NSW experiencing a sudden burst of winter temperatures this month, homeowners and businesses could consider portable gas heaters which can provide quick, targeted warmth – but we are being urged to put safety ahead of convenience when choosing and operating gas-powered heating.

Portable models are commonly marketed as infrared or radiant heaters, which warm people and objects directly; blue-flame or convection heaters, which primarily warm the surrounding air; and catalytic heaters, which use a catalyst to produce flameless radiant heat.

However, Australians should not assume any portable gas heater is suitable for use inside a home, cabin, caravan or other enclosed space. Rules also differ between states, and consumers should check that an appliance is certified and specifically approved for its intended location.

NSW Health warns that unflued gas heaters release combustion products directly into the home, including carbon monoxide and nitrogen dioxide. Carbon monoxide is colourless and odourless and, at high concentrations, can cause headache, dizziness, nausea, confusion, unconsciousness and death.

Ventilation is particularly important. NSW Health advises people using an approved unflued heater to ensure room vents are not blocked, or to keep a door or window open where required. Unflued gas heaters should never be used overnight in a room where someone is sleeping.

Restrictions vary nationally. Victoria restricts the installation of new indoor flueless space heaters, while Western Australia has prohibited the sale and use of LPG cabinet heaters, highlighting the importance of checking local requirements before buying.

The Australian Competition and Consumer Commission also warns never to use a gas heater or barbecue designed for outdoor use inside the home. It recommends keeping heaters on a flat surface and at least one metre from bedding, furniture, curtains, clothing and other combustible materials. Gas heaters should also be serviced regularly by a qualified tradesperson.

Fire and Rescue NSW similarly says portable outdoor gas heaters should only be operated in well-ventilated outdoor areas and according to manufacturers’ instructions.

Whatever style of heater you choose, check its certification, follow its operating instructions and never leave it running unattended.