Heating with pellets - a carbon-neutral fuel

Wood pellets for heating are the eco-friendly alternative

Pellets for heating are made by compressing wood shavings and sawdust from untreated wood. An enormous amount of wood waste is produced everyday in the wood processing industries, which is sustainably repurposed. The amount of CO2 emitted during the combustion of the wood pellets is balanced out by the amount of CO2 absorbed by the trees while growing the wood used for the biomass fuel. This balance is outstanding compared to fossil fuels like oil or gas.

Advantages of using pellets for heating

  • Crisis-resistant local fuel
  • Short transport routes
  • Easy refill of the wood pellet storage with pellet bags or pellet fuel trucks
  • Dust-free and odourless refilling
  • Low place requirements for the storage
  • Efficient and Eco-friendly pellet boilers

Compared to fossil fuel, electricity, or heat pumps, using wood chips or pellets for heating is the best choice.

Most important quality-criteria for wood pellets

  • Lowest possible dust content
  • Hard and shiny surface of the pellets
  • Natural wood, no additives

Quality standards for wood pellets for heating

Pellets for heating are standardised according to the ÖNORM M 7135 or EN 17225-2.

Specification ÖNorm M 7135 EN 17225-2  Class A1
Heating value > 18 MJ/kg = 5 kWh/kg 16,5 < 0 < 19 MJ/kg = 5 kWh/kg
Weight 650 kg/m³ > 600 kg/ m³
Diameter 6 mm < 6 + - 1,0 mm
Length 5-40 mm 3.15 < L < 40 mm (99 %), L < 45 mm (1%)
Water content w < 10% w < 10%
Dust content < 1% < 1%
Ash content < 0.5 % < 0.7 %
Energy demand for production: approx. 2.7% of energy content


Are you heating with pellets? Please consider the quality when purchasing or receiving wood pellets and look for the quality proof according to the ÖNORM M 7135.