Carbon Monoxide - The Silent Killer

Be a CO hero. You can't see it, taste it, or smell it, but Carbon Monoxide (CO) can kill.

What is CO?

Carbon Monoxide is a poisonous gas that is produced when gas, oil, solid fuels and liquid petroleum gas (LPG) do not burn fully. It can occur when an appliance has been incorrectly fitted, badly repaired or poorly maintained.

Spotting the signs

• Lazy yellow or orange flames (rather than crisp and blue) on a gas appliance
• Pilot lights frequently blowing out
• Dark staining around/on appliances
• Increased condensation on windows

What should I do if I suspect CO poisoning?

1. Call the National Gas Emergency Service on 0800 111 999
2. Turn off appliances, open doors & windows and leave the property
3. See your doctor immediately or go to the hospital

Recognising the symptoms

• Headaches
• Dizziness
• Nausea
• Breathlessness
• Collapse
• Loss of consciousness

Stay safe at home

• Install an audible CO alarm. 
• Get your appliances serviced by a qualified engineer once a year.

Gas appliances  call 0800 408 5500 or visit Gas Safe Register gassaferegister.co.uk 

Solid fuel  call 01684 278170 or visit for Heating Equipment Testing & Approval Schemes  (HETAS) hetas.co.uk 

Oil appliances  call 01473 626 298 or visit Oil Firing Technical Association (OFTEC) oftec.org 

Be a CO Hero and Get a FREE Carbon Monoxide alarm from Northern Gas Networks for yourself or a loved one 

We want everyone to stay safe from Carbon Monoxide, which is why this winter, Northern Gas Networks are giving away 2,000 FREE Carbon Monoxide alarms. Just follow this link and click the 'Take our short survey' button:

https://www.northerngasnetworks.co.uk/network-supply/carbon-monoxide-2/cohero/