Frequently Asked questions

  1. Carbon monoxide poisoning - what are the symptoms?
  2. What should I do if I experience any symptoms of carbon monoxide poisoning?
  3. What is carbon monoxide poisoning?
  4. How do I avoid a carbon monoxide leak in my home?
  5. How often should I get my boiler checked?

Carbon monoxide poisoning - what are the symptoms?

You can't see it, taste it or smell it but it can kill quickly and with no warning. Unsafe gas appliances produce a highly poisonous gas called carbon monoxide (CO). It can cause death as well as serious long term health problems such as brain damage.

Remember the six main symptoms to look out for:

  1. Headaches
  2. Nausea
  3. Breathlessness
  4. Collapse
  5. Dizziness
  6. Loss of consciousness

Being aware of the symptoms could save your life.

Carbon monoxide symptoms are similar to flu, food poisoning, viral infections and simply tiredness. That's why it's quite common for people to mistake this very dangerous poisoning for something else.

Other signs that could point to carbon monoxide poisoning:

  • Your symptoms only occur when you are at home
  • Your symptoms disappear or get better when you leave home and come back when you return
  • Others in your household are experiencing symptoms (including your pets) and they appear at a similar time

What should I do if I experience any symptoms of carbon monoxide poisoning?

  • Get fresh air immediately. Open doors and windows, turn off gas appliances and leave the house
  • See your doctor immediately or go to hospital - let them know that you suspect carbon monoxide poisoning. They can do a blood or breath test to check
  • If you think there is immediate danger, call the Gas Emergency Helpline

Great Britain: 0800 111 999
Guernsey: 01481 749000
Isle of Man: 0808 1624 444
Northern Ireland: 0800 002 001

  • Get a Gas Safe registered engineer (all of our engineers are Gas Safe registered) to inspect your gas appliances and flues to see if there is a dangerous problem

Don't assume your gas appliances are safe: get a Gas Safe registered gas engineer to do a check. This is the only safe way to prevent yourself and those around you from incurring serious illness or death due to carbon monoxide exposure.

What is carbon monoxide?

Carbon monoxide (CO) is a highly poisonous substance produced by the incomplete burning of gas and Liquid Petroleum Gas (LPG).

This happens when a gas appliance has been incorrectly fitted, badly repaired or poorly maintained. It can also occur if flues, chimneys or vents are blocked.

Oil and solid fuels such as coal, wood, petrol and oil can also produce carbon monoxide.

What is carbon monoxide poisoning?

  • Carbon monoxide poisoning occurs when you breathe in even small amounts of the gas.
  • When you breathe in carbon monoxide, it gets into your blood stream and prevents your red blood cells from carrying oxygen. Without oxygen, your body tissue and cells die.
  • Levels that do not kill can cause serious harm to health when breathed in over a long period of time. Long term effects of carbon monoxide poisoning include paralysis and brain damage. Such long term effects occur because many people are unaware of unsafe gas appliances and subsequent gas leaks.

How do I avoid a carbon monoxide leak in my home?

Your home may show signs of carbon monoxide. Any one of the following could be a sign that there is carbon monoxide in your home. Get your gas appliances checked to avoid carbon monoxide poisoning.

  • The flame on your cooker, fire or boiler should be crisp and blue. Lazy yellow or orange flames mean you need to get your appliances checked
  • Soot or dark staining around or on appliances
  • Pilot lights that frequently blow out
  • Increased condensation inside windows

If you have a faulty appliance in your home, it could lead to carbon monoxide poisoning. Get it checked as soon as possible by a Gas Safe registered engineer.

How often should I get my boiler checked?

It is recommended to have your boiler serviced annually by a Gas Safe registered engineer, then ensures your boiler is running efficiently and the gas safe registered engineer will check for any leaks.

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