Wood pulp, through various processing steps, such as coarse chipping (wooden chips), drying and grinding, is pressed in a special press at high temperature and pressure to produce wooden pellets. At the end of the production stage, the finished product has a cylindrical shape, 6 mm in diameter and up to 30 mm in length.

The use of pellets as fuel has a number of advantages over solid fuel:

  • requires less storage space;
  • due to their high calorific value, smaller quantities are needed – up to 5 times less than solid fuels;
  • their burning produces less carbon dioxide, soot and ash;/li>
  • the possibilities it offers for automatic combustion process of pellet heating appliances are much greater;
The adoption of the European standard EN 14961-2 in 2010, prescribes uniform requirements for wood pellets in Europe. It provides new requirements for pellets, including length, diameter, ash, moisture content and other requirements. It introduces a new ENplus certificate for pellets used in domestic boiler equipment and the EN-B certificate for industrial pellets used in industrial boiler equipment. ENplus has 2 grades for A1 and A2 qualities. Class A1 has the most stringent restrictions on ash content in pellets – up to 0.7%. In Class A2, the ash content is up to 1.5%. For industrial pellets, the EN-B certificate is significantly reduced – ash content may be up to 3.5%.

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