Carbon monoxide is a poisonous gas that has no smell or taste. Breathing it in can make you unwell, and it can kill if you're exposed to high levels. Every year there are around 60 deaths from accidental carbon monoxide poisoning in England and Wales.

How can you tell if there is carbon monoxide in your house?

Signs of a carbon monoxide leak in your house or home

Sooty or brownish-yellow stains around the leaking appliance. Stale, stuffy, or smelly air, like the smell of something burning or overheating. Soot, smoke, fumes, or back-draft in the house from a chimney, fireplace, or other fuel burning equipment.

What did carbon monoxide smell like?

Carbon monoxide (CO), the silent killer. Carbon monoxide is a silent killer. It has no smell, no taste, and no sound.