Carbon monoxide (CO) is a highly poisonous gas produced by the incomplete burning of any carbon fuel such as natural gas or liquefied petroleum gas (LPG). This can happen when a gas appliance has been incorrectly fitted, badly repaired or poorly maintained. It can also occur if flues, chimneys or vents are blocked. Solid fuels, such as coal, wood, petrol, as well as oil, can also produce carbon monoxide when they burn.
CO can be deadly and is especially dangerous because you can’t see, taste or smell it, and some symptoms mimic the effects of viruses and even a bad hangover. It’s important to know the physical symptoms of CO poisoning to ensure you seek help quickly.
Carbon monoxide poisoning can occur when it builds up in your bloodstream replacing oxygen. When this happens, the blood cannot carry oxygen around the body. This lack of oxygen can result in the body’s cells not getting enough oxygen, failing and dying.
Even small amounts of the gas can cause poisoning, and long-term exposure can result in paralysis, brain damage or even death.
CO poisoning symptoms are similar to those of flu, food poisoning, viral infections, fatigue, and a hangover which makes it easy to mistake this very dangerous poisoning for something else.
Anybody who has overdone it on a night out will be familiar with some or all of those symptoms, but if you experience them without drinking it could be time to be concerned. Being aware of these symptoms could save your life.
There are also other signs that could indicate CO poisoning, such as:
It’s important to know the signs of a carbon monoxide leak in your home, because knowing the signs can ensure you aren’t exposed to dangerous levels of CO for an extended period of time.
Any of the following could be a sign of CO in your home:
If you believe you have any of these signs, please get into fresh air and contact your emergency services provider. If carbon monoxide is not found in the blood stream a competent engineer can visit the site to complete a safety check. If carbon monoxide is confirmed in the blood stream, no-one should be allowed on site until the HSE allow it.
To find engineers who are qualified to investigate the presence of CO, go to the Check The Register page on this site, and follow these steps:
Remember that not getting your gas appliances regularly checked, or using an engineer that isn’t Gas Safe registered, can put you and your family at risk.
You can also visit the NHS website for detailed information on the symptoms of CO poisoning, what action to take and the treatment that’s usually provided.
The most important thing you can do to minimise the risk of CO poisoning is to ensure that your gas appliances are safety checked annually by a Gas Safe registered engineer.
Installing an accredited carbon monoxide leak detector, or audible CO alarm, in your home (or business) is a good second line of defence, as they emit a sound when CO is detected. However, because an CO detector’s alarm only activates once there is CO present, you should never rely on them as your sole form of prevention.
To ensure their effectiveness, make sure any CO detector you buy is kitemarked to standards BS EN 50291-1:2010 (for domestic premises) and/or BS EN 50291-2:2010 (for caravans and boats). We don’t recommend the use of ‘black spot detector’ warning strips because their warning is too easily missed and they don’t emit a sound, so they won’t alert you if you have a CO leak whilst you’re asleep.
Carbon monoxide detectors are an early alert for possible carbon monoxide poisoning. They can be installed in and around your home, as described in the manufacturer guidelines, and work much like your fire or smoke alarm by sounding an alarm when they detect carbon monoxide. There are a variety of models available on the market so be sure to find one that will be suitable.
Modern CO detectors look like smoke alarms (standard smoke alarms do not detect CO) and you can purchase one at most major retail outlets, including DIY stores and supermarkets. It’s advisable to fit an CO detector in every room with a gas appliance, following the manufacturer’s fitting instructions carefully. Typically, CO detectors have a lifetime of between 5-10 years. Just like your smoke alarm, remember to test your CO detector regularly.
If you’re unsure which carbon monoxide detector to get, you can ask a Gas Safe registered engineer for advice.
If you have been affected by CO and would like to share your story please get in touch with us by email.
The Gas Safe Charity have created a short film explaining the sources, signs and symptoms of carbon monoxide poisoning using British Sign Language. You can view the short film at the YouTube URL below:
To find out more information about CO poisoning and the risk an unsafe gas boiler may pose visit our Boiler Guide.