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Carbon Monoxide Alarm

Carbon monoxide is invisible, odourless and deadly — an alarm is the only way to know it's there, and essential wherever you burn fuel for heat, light or cooking.

Carbon Monoxide Alarm

Why it matters

Carbon monoxide has no smell, colour or taste, and it kills by stealth — often while people sleep. It's produced by any burning fuel: gas boilers, wood stoves, camping stoves used indoors, generators and paraffin heaters. In an emergency, when people improvise heating and cooking, the risk spikes. A CO alarm is the only reliable warning you'll get.

It's a small, inexpensive device that quite literally saves lives. Every home with a fuel-burning appliance should have one, and a portable unit is essential in caravans, boats, and anywhere you might run a stove or heater during a power cut.

When to use it

Fit one near sleeping areas and any fuel-burning appliance at home, and take a portable unit when using gas or solid-fuel heating and cooking away from mains power — caravans, boats, cabins. Crucially, never run a camping stove, barbecue or generator in an enclosed space, alarm or not; the alarm is a last line of defence, not a licence.

Features to look for

A sealed 10-year battery

A sealed long-life battery means a decade of protection with no forgotten battery changes — ideal for a device you must not let go flat.

A clear digital display

A screen showing CO levels lets you see a problem building before the alarm point, and confirm the air is clear afterwards.

Portability and a loud alarm

A portable unit covers caravans, boats and power-cut heating; a loud 85dB+ alarm wakes you from sleep, which is when CO is most dangerous.

Common mistakes

Using fuel appliances indoors without ventilation

No alarm makes it safe to run a camp stove, BBQ or generator in a closed room or tent. Keep them outdoors — the alarm is a backup, not permission.

Never testing it

An untested alarm may be dead when it matters. Press the test button periodically and replace the unit at its end-of-life date.

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