Carbon monoxide is a colourless, odourless, tasteless and highly poisonous gas that is produced when natural gas or LPG burns. The human body doesn't recognise when carbon monoxide is present, which means it can easily kill you - it's often called 'the silent killer' for this reason.

Using gas appliances safely means they should only produce a small, safe amount of carbon monoxide.

Faulty or poorly maintained gas appliances present a very high risk of causing carbon monoxide poisoning of the people in your home.

If you have a gas appliance in your home, or you are a landlord who rents out homes with indoor gas appliances, ensure they are serviced every two years to minimise the risk of faults occurring.

Carbon monoxide poisoning


Symptoms of carbon monoxide poisoning may occur while using a gas appliance, or immediately after using one. Be aware of:

  • persistent tiredness and sleepiness
  • shortness of breath
  • mild and severe headaches
  • nausea
  • vomiting
  • weakness
  • confusion
  • loss of consciousness.

Are you being affected by carbon monoxide?

If you feel all right when you are out in the fresh air but experience any of the symptoms listed above when using a gas appliance or heater in your home, seek immediate medical attention and tell your doctor that you suspect carbon monoxide poisoning.

To determine if there is any carbon monoxide in your blood, the doctor will need to do a blood test. If the results confirm there is carbon monoxide in your blood, stop using your gas appliances at home immediately and organise for a licensed gas fitter to check and service them.

Extreme carbon monoxide poisoning may lead to confusion, loss of consciousness (this can occur quickly if the level of carbon monoxide is high) and even death.

Some people are especially sensitive or susceptible to carbon monoxide poisoning including:

  • people with heart disease
  • people with anaemia
  • young children
  • pregnant women and their unborn babies
  • the elderly.

Treating someone with carbon monoxide poisoning

To treat a person who is suffering from carbon monoxide poisoning, move them to a well ventilated, gas-free area. Call emergency services on 000 and start the DRSABCD resuscitation procedure, being careful not to inhale the air coming out of the patient.

Exposure limits and testing

If you are concerned about carbon monoxide levels in your home, workplace or any other area, contact a licensed gas fitter to test the levels for you.

Related information

On this site

Was this page useful?

Thanks for contributing - your feedback helps us improve this website.

Page last updated 2 March 2023

Provided by:
Department for Energy and Mining
Last Updated:
Printed on:
Copyright statement:
SA.GOV.AU is licensed under a Creative Commons Attribution 4.0 Licence. © Copyright 2023