Causes of Carbon Monoxide Poisoning
Causes of carbon monoxide poisoning are linked to the burning of fuel in enclosed or poorly ventilated spaces. The most common causes include malfunctioning heaters, blocked chimneys, car exhaust fumes, and indoor use of charcoal or gas-burning appliances.
At home, faulty boilers, gas heaters, water heaters, wood-burning stoves, and fireplaces are major sources. If these appliances are not installed correctly, poorly maintained, or used in confined spaces, carbon monoxide can accumulate to dangerous levels.
Blocked flues or chimneys prevent combustion gases from escaping properly, forcing CO back into the room. Cracks or leaks in furnace heat exchangers can also release CO into the air.
Running petrol or diesel engines indoors — such as in garages, workshops, or basements — is particularly hazardous. A car left idling in a closed garage can produce lethal CO levels within minutes. Power generators, lawn mowers, and pressure washers can also pose risks if used in or near enclosed spaces.
Carbon monoxide can also build up in caravans, tents, or boats if portable stoves, grills, or heaters are used without proper ventilation.
In workplaces, sources may include gas-powered tools, forklifts, or industrial equipment used in enclosed spaces without adequate airflow.
Tobacco smoke also contains small amounts of carbon monoxide, and chronic exposure in smokers may contribute to low-level poisoning.
Causes of Carbon Monoxide Poisoning
Lack of a working CO detector significantly increases the risk, as people may be exposed for hours or days before realising something is wrong.
Recognising the causes of carbon monoxide poisoning is crucial for prevention. Installing CO detectors, ensuring proper ventilation, and regular appliance servicing are the most effective ways to stay safe.
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