How do a kitchen chimney and gas hob work?

A spark of 14,000 volts, a jet of gas that drags in its own air, and a hood that catches smoke it can barely suck. LPG waits as a liquid in a 14.2 kg cylinder at about 5 bar. The gas shoots from a tiny injector into a mixing tube and drags air in with it, the Bunsen principle.

Read how it works: How do a kitchen chimney and gas hob work? · The history of the kitchen chimney and gas hob · More boxes on Glassbox

Chapters in this interactive model

1. Inside a gas stove and kitchen chimney: A red cylinder, a regulator, a hose, three burners, and a fan in a hood.
2. Why a good gas flame is blue: A jet of gas drags air in with it. Enough air, and it burns clean and blue.
3. The spark, and the sensor that stops a gas leak: Thousands of volts light the gas. A few millivolts keep it flowing.
4. How a chimney catches smoke: Hot air rises by itself. The hood just has to swallow it before a draught steals it.
5. How a filter traps oil you can’t see: Air can turn a sharp corner. A heavy droplet of oil can’t, so it hits the metal.
6. Where the air goes: ducts, bends and noise: The number on the box is not the air you get. Every bend and narrow pipe steals some.