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Wood pellet specifications

A European standard for wood fuel pellets was introduced in 2011 EN 14961-2 the specifications for premium wood pellets are:

  • Particle size: 6mm to 8mm for domestic and small scale systems, 10-12 mm  for larger systems
  • Moisture content: less than 10%
  • Calorific value: less than 4.7kWh/kg
  • Ash content: less than 1% (low), less than 3% (standard) or less than 6% (high); to be clearly labelled
  • Bulk density: less than 600 kg/m
  • Sulfur content: less than 300 ppm
  • Chlorine: less than: 800ppm
  • Only additives: lignin and trace amounts of vegetable oil as a die lubricant

Mechanical durability of pellets is specified in EN 335, with determination by technical standard CEN/TS 15210-1:2005.

The CEN/TC 355 standards include detailed specifications for sampling and testing biomass fuel.

ENplus wood pellet certification

ENplus is a unifying wood pellet quality assurance system based on the EN 14961-2 standard for wood pellets. It was agreed upon by the European Pellet Council in January 2011. HETAS is a certification body.

For further information on ENplus see Woodfuel accreditation schemes.

Useful links

Handbook for the certification of wood pellets