Signs of a carbon monoxide leak

How to detect and prevent carbon monoxide leaks in your home

A warm, cosy home is something we all enjoy – but with fuel-burning appliances like gas boilers or stoves, it’s important to be aware of a hidden danger: carbon monoxide.

This gas is produced when fuels like gas, oil, coal or wood don’t burn fully, often because there’s not enough oxygen in the room. If carbon monoxide builds up, it can become a serious risk.

ℹ️What is carbon monoxide?

Carbon monoxide is a colourless, odourless and tasteless gas – so you might not know there’s a leak until symptoms appear. Breathing it in can cause illness, unconsciousness, and in severe cases, death. Sadly, it’s known as the ‘silent killer’, causing around 40 deaths in Ireland each year.

Common signs

Look out for:

• Black, brown or yellow stains around boilers, stoves or fires
• Smoke building up in rooms – often due to a blocked flue or chimney
• Pilot lights that keep going out
• More condensation than usual on windows or walls
• A yellow or orange flame instead of a clear blue one on gas appliances
• A musty smell when an appliance is switched on – this isn’t the carbon monoxide itself, but could indicate other fumes are present

Physical signs of carbon monoxide poisoning

Carbon monoxide poisoning can affect anyone, but the elderly, children and pets are particularly vulnerable.

Look out for:

• Flu- like symptoms (tiredness, low energy, headaches)
• Breathlessness
• Nausea or dizziness
• Chest pain or diarrhoea
• Collapse or loss of consciousness

If you notice any of these signs, seek medical attention right away.