Pellets
Pellets are a type of compressed firewood, with the form of small cylinders of 6-8 mm diameter and 10-25 mm length, which can be used as an alternative heating solution (instead of oil and natural gas). Their humidity is less than 10%, and their thermal performance amounts to 4200 J/kg. During their combustion, the pellets do not harm the environment, because they release all the amounts of carbon dioxide they have absorbed, thanks to the materials they are made of.