What is carbon monoxide?

Carbon monoxide (also known by its chemical symbol, CO) is a highly poisonous gas. It has no colour, no smell, no taste and is often called ‘the silent killer’.  

It can be produced by any fuel when burned — coal, turf, oil, gas, wood. It doesn’t just occur at home— it can be produced anywhere fuel is being burned: caravans, tents, mobile homes, boats, etc.  

Carbon monoxide can enter spaces where: 

• You have a faulty appliance 
• Your appliance hasn’t been maintained 
• The room is not properly ventilated 
• The chimney or flue is blocked  

Carbon monoxide poisoning 

Symptoms of carbon monoxide poisoning can be like those caused by other illnesses such as a cold or flu. However, if anyone in your house has any of the following symptoms when using a gas appliance, turn it off and contact your doctor: 

• Unexplained headaches, chest pains or muscular weakness 
• Sickness, diarrhoea or stomach pains 
• Sudden dizziness when standing up 
• General lethargy  

Stop using the appliance immediately and don’t use it again until it’s been checked by a Registered Gas Installer or a qualified service engineer.   

For more information on carbon monoxide, see gasnetworks.ie.

In case of a gas emergency, call Gas Networks Ireland 24-hour emergency number 1800 20 50 50.