A wood gasifier is a fuel generator that converts dry wood into fuel through combustion. The fuel generated from a wood gasifier is smokeless, environmentally friendly and economical, and it is used to fuel internal combustion engines, stoves and furnaces.
The most common designs of wood gasifiers are updraft, downdraft and crossdraft. In updraft gasifiers such as stoves, wood enters the gasification chamber from above, and the converted fuel exits the top of the chamber. In downdraft and crossdraft designs, wood enters from above, but air and fuel enter and exit from different locations on the unit. Wood gasifiers convert approximately 75 percent of fuel energy content into combustible gas that can be used as fuel.