The burning of wood currently experiences a revival. Wood as a raw material is a renewable and extremely environmentally friendly source of energy. Wood burns in a CO2-neutral way and, with a look at the increasing energy prices, represents an interesting alternative or supplement to oil or gas.

 

The manual feeding of a boiler fired with logs makes this boiler type, in most cases, only a supplement to an existing oil or gas boiler system.

One cubic metre of well-dried logs (20% residual moisture) has the same calorific value as about 200 litres of fuel oil or 200 m³ of natural gas.

To achieve an optimised burning behaviour and to efficiently use the heat energy released, excessive heat is stored in a buffer tank.

The dimensions of the wood-fired furnace and buffer tank that suit the respective premises must be calculated by an expert.

 

 

Pellets are small cylinders made of natural wood waste such as wood chips and sawdust under high pressure and without any binding agents.

The calorific value ranges at about 5 kWh/kg, i.e., 2 kg of pellets have the same calorific value as 1 litre of fuel oil.

Central pellet boiler systems offer fully automated heating and are comparable to modern oil- or gas-fired heating systems concerning their ease of operation.

Already by now, pellets may be an economical alternative to traditional fossil fuels. The average cost of pellets is currently at a level of about 60% of the typical yearly cost of fuel oil and natural gas.