In Choroszcz, in north-eastern Poland, a wood-fired boiler of 4 MWt has been realised in 2008. About 14,000 MWh is produced annually from 5,000 tonnes untreated and clean virgin wood chips with a high moisture level produced from forestry and sawmill activities to provide district heating to the city district heating network.

The installation has low maintenance cost due to the smart simplicity of the provided solution. The city heat supplier is able to supply the energy with very competitive cost level. A well-planned maintenance program avoids unnecessary down time or costly repairs. The project is equipped with a very sophisticated control system. The boiler is highly efficient due a low temperature of the fumes.


Start-up / first fire 2008


Input 5,000 tonnes / year of virgin wood chips with high moisture level
Wood supply system Bunker, moving floor, belt conveyor and hydraulic push infeeder.
Fire tube hot water boiler 4 MWt
Efficiency 86%


  • Highly efficient boiler due to low temperature fumes;
  • High availability;
  • Processing of high level moisture wood chips;
  • Robust system;
  • Sophisticated management of primary and secondary air systems.
  • Remote access to a control system.