How To Make your own Gasifier Stove
The design of this ‘wood gasifier’ stove is exceedingly simple and it can be built in under an hour using only empty tin cans and a few very basic tools (watch it in operation here). It would make a great little maker project with your kids; you’ll have great fun working on building this together, and will have a superb little cooking stove to use afterwards! The gasifier design is also a wonderfully compact and efficient stove, burning twigs you can collect yourself (rather than gas canisters), that’s ideal for cooking during a barbecue in the back garden or even on a family camping trip.
The gasifier stove is made up of a smaller can nestled inside a larger can, allowing air to circulate in the gap between them. Wood is loaded into the inner can as fuel, and as it burns it draws fresh air up through the bottom for a hearty, intense combustion – just like any barbecue. What’s unique about a gasifier stove is that it has a second, higher row of air holes that reintroduce oxygen. As wood breaks down in the heat of a fire it releases lots of gases and vapours and smoke that are all actually flammable, but would otherwise have blown away in a normal fire. But with this second row of air holes, fresh oxygen is drawn in and you get secondary combustion of all these gases. This means a gasifier stove is very efficient and releases all of the heat energy in the fuel, and is also smokeless when it’s running. Gasification of wood has been crucial through history, and can even be used to drive a car or van instead of petrol or diesel – there were over a million wood-powered cars across Europe during the Second World War!
Here’s how to make your own gasifier stove.