Flues and ventilation safety tips

Adequate ventilation and proper flueing are essential for safe and efficient operation of gas appliances.

Many internal domestic gas appliances are designed to operate with a flue. There are two common types of flue:
  • an open flue, which is fitted through the ceiling and roof
  • a room sealed flue, which is usually fitted through the wall.

Flue safety

Discolouration or stains on walls or appliance casing may be signs of a blocked flue. This could mean combustion products are spilling into the room and there is a risk of carbon monoxide poisoning. The appliance should be turned off immediately until it can be inspected and serviced by a licensed gasfitter.

The licensed gasfitter will make sure your flue is not obstructed or blocked and that there are no holes in the flue as these problems can cause flue gases to escape into your house instead of passing safely outside.

The flue cowl must be in good condition so that it does not collapse into the flue outlet and obstruct it. The flue cowl must also prevent entry of vermin or birds that may obstruct the flue pipe.

Ensure the flue terminal of a room sealed or outdoor appliance is free of plant growth, insect nests or any other obstruction.

Ventilation

Gas cookers and unflued gas heaters consume air and release products of combustion into the room. They can make the room stuffy if there is inadequate ventilation. Water vapour present in the combustion products can also condense on cold surfaces and may lead to mould growth on walls and ceilings where there is poor ventilation.

Ensure that adequate ventilation is available when an unflued appliance is being used.

More information

Energy Safe Victoria on 1800 069 588 during business hours.
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