Wooden pellets are made from waste produced by the wood industry, compacted into small cylinders with a diameter between 6 and 8 millimetres and a length of up to 30 mm using pressing techniques.
This fuel is heavier and more compact than wood, thanks to its compression; therefore, when used in equal volumes, pellet combustion produces more heat than the wood products usually employed.
Wooden pellets are considered a renewable energy source, as the trees used to produce them are left to grow steadily and replaced with younger plants the moment they are felled, in a continuous cycle.