A wood gasification boiler is a boiler that uses a process called wood gasification in order to heat a home or area. Wood gasification occurs when timber or charcoal is converted into wood gas, a syngas that consists of nitrogen, carbon monoxide, hydrogen, methane and trace amounts of other gases.
Once the wood or charcoal is burned in the firebox, fresh air is then filtered in and blown into the firebox. The resulting mixture of hot air and gases that are created by the burning wood or charcoal is then pushed out and used to heat the home or area where the unit is located. This method is used because it is energy efficient and also creates very little soot and ash residue. The gases created from the process can also be used for other purposes such as powering an internal combustion engine.