Carbon Monoxide: The Silent Danger in Student and Rented Accommodation

Why Carbon Monoxide Is Especially Dangerous

Carbon monoxide is produced whenever fuel is burned: gas, oil, wood, coal, and petrol all generate it. In a well-ventilated space with properly maintained appliances, the gas disperses harmlessly. But when ventilation is poor or appliances are faulty, it can accumulate to dangerous concentrations. What makes carbon monoxide uniquely hazardous is that it is completely undetectable without equipment. It has no colour, no smell, and no taste. By the time you realise something is wrong, you may already be seriously affected.

Carbon monoxide interferes with the blood's ability to carry oxygen, essentially causing the body to suffocate even while breathing normally. At low concentrations, it causes symptoms that are easily confused with other illnesses. At high concentrations, it can kill within minutes. Young adults in student accommodation or privately rented housing are particularly at risk because they may live with gas appliances they did not choose, in buildings they are less familiar with, and may not know whether appliances have been recently serviced.

Sources of Carbon Monoxide in the Home

Any fuel-burning appliance or device is a potential source. The most common sources in residential accommodation include gas boilers, gas cookers and hobs, gas fires and room heaters, wood-burning stoves and open fireplaces, and portable gas or kerosene heaters. Less obvious sources include barbecues brought indoors, vehicles running in garages attached to living spaces, generators run indoors or in poorly ventilated areas, and even some battery-powered appliances in certain circumstances.

Blocked or damaged flues and chimneys are a common cause of carbon monoxide build-up. When combustion gases cannot escape properly, they back up into the living space. This can happen when birds or animals nest in a chimney, when a flue becomes cracked or disconnected, or when a vent is accidentally blocked.

Recognising Carbon Monoxide Poisoning

The symptoms of carbon monoxide poisoning at low to moderate concentrations are non-specific and easily attributed to other causes. This is part of what makes it so dangerous. Symptoms typically include headache, dizziness, nausea and vomiting, fatigue and weakness, shortness of breath, confusion, and blurred vision. These symptoms often feel like flu without fever, or like a particularly bad hangover.

A critical clue is that symptoms improve when you leave the property and return when you come back. If multiple people in the same building are experiencing similar symptoms at the same time, this is also a strong indicator. Carbon monoxide poisoning should be suspected particularly if symptoms are more severe when you are at home and ease when you go outside.

At higher concentrations, carbon monoxide poisoning causes loss of consciousness and can be rapidly fatal. A person who loses consciousness in a room with a faulty gas appliance is in immediate, life-threatening danger.

Prevention: What You and Your Landlord Should Do

The most important prevention measure is installing at least one carbon monoxide detector on every floor of your accommodation that has a fuel-burning appliance. Carbon monoxide detectors are inexpensive, widely available, and in many countries are legally required in rented accommodation by landlords. If your accommodation does not have one, ask your landlord to install one. If the landlord refuses or delays, purchasing your own is a small investment that could save your life.

Test your carbon monoxide detector regularly by pressing the test button. Replace the batteries annually or as recommended, and replace the entire unit according to manufacturer guidance, as the sensing element degrades over time. Never ignore an alarm. If your carbon monoxide alarm sounds, treat it as a genuine emergency.

Landlords in most countries are legally required to have gas appliances serviced and safety-checked annually by a qualified engineer and to provide a current gas safety certificate. Ask your landlord for this certificate when you move in and annually thereafter. Do not use gas appliances if you have reason to believe they have not been recently serviced.

Ensure that ventilation around appliances is not blocked. Do not cover vents or grilles in rooms with gas appliances. Never use a barbecue, outdoor heater, or portable generator indoors or in an enclosed space, even a tent or van. Never run a car engine in an attached or enclosed garage.

What to Do If Your Alarm Sounds

If your carbon monoxide alarm activates, act immediately. Get everyone out of the building into fresh air. Do not stop to collect belongings. Call the emergency services and the national gas emergency number if gas appliances are involved. Do not go back inside until the emergency services or a qualified engineer have declared it safe to do so. Seek medical attention even if you feel fine, as carbon monoxide can cause internal harm without obvious symptoms at the time.

If someone has lost consciousness and you suspect carbon monoxide poisoning, call emergency services immediately and move the person to fresh air if you can do so safely. Do not re-enter a building where carbon monoxide levels may be high without breathing apparatus.

Protecting Yourself as a Renter

As a renter, you cannot always control the maintenance of appliances in your home, but you can protect yourself through awareness and action. Know the symptoms of carbon monoxide poisoning and trust those symptoms if they arise. Ensure there is a working carbon monoxide detector in your home. Report any concerns about appliances, smells, or unusual sounds from boilers or gas equipment to your landlord in writing immediately. A landlord who does not respond to safety concerns about gas appliances is failing in their legal duty, and you can report this to national gas safety bodies or housing authorities.

Carbon monoxide accidents in rented homes are entirely preventable. A working detector and properly maintained appliances are all that is needed to eliminate this risk. Knowing what to look for and acting on concerns promptly is how young adults protect themselves in accommodation they did not originally set up.