Chips produced by wood chippers are an ideal fuel (biofuel). They are about 10-14cm long. They can be made from coniferous and deciduous trees of all species.
Chips are cheap fuel material. The calorific value of forest chips is the same as of wood and equals 6 to 16 MJ/kg.
They can be an alternative to coal heating. 1 ton of bituminous coal of medium quality may be replaced with about 1.3 to 1.5 tons of chips, resulting in clean energy.
Chips need to be stored under shelter. In 3-4 months their moisture content is about 20%, which is the optimum value for firewood.