Heating with wood is an ecological - and compared to fossil fuels also cost-effective - thing. Wood heating is not the same as wood heating: which different options are there for heating wood, and where the advantages and disadvantages lie, this article shows.
Wood as a raw material
Wood is a renewable resource that is usually available at low cost. Because of the high availability of wood, price increases are also unlikely, which makes wood heating a fairly predictable thing.
Heating with wood is also virtually carbon neutral as it is a closed carbon dioxide cycle. In which form one burns wood, but can be different.
The stove is a very inexpensive, but not very convenient form of wood heating for individual rooms. It is now used practically only as additional heating with a high feel-good and decorative factor.
High quality wood is required for the stove, preferably beech wood. Too soft wood burns off too quickly and gives off too little heat.
An interesting option is the classic Bullerjan stoves, which can also be equipped with a water bag, and can also serve as a water heater in winter. Several rooms can be heated with hot water via pipelines, and mini-central heating is created for smaller areas.
Tiled stoves are characterized above all by their heat storage capacity. For high-quality, well-planned tiled stoves you can often have enough residual heat for two days after heating. The cost of building a high-quality tiled stove, however, are extremely high, so they are only used by lovers as a heater for smaller houses.
In individual cases, they can even cover more than one floor, and can also supply relatively large areas with radiant heat (similar to infrared heating).
Pellet boilers and woodchip heaters
Pellets are pressed wood waste with a very high density. This brings a very high energy density and high efficiency in a pellet heating with it and at the same time ensures very low ash.
Firewood boilers can also be retrofitted for operation with pellets, but this option is not always an ideal solution.
A suitable storage room must be available for the pellets, and an automatic feeder must be installed in the oven. This does not need to be refilled with pellet heaters and the oven can also run automatically.
A disadvantage of pellets is that it is an industrially manufactured product that is subject to market and price fluctuations.
Wood chips are the cheaper alternative here. They are made with very little effort from wood waste, are usually cheaper and also more stable in price, but also produce more ash than pellets.
Wood Carburetors are log wood boilers in which the wood and the resulting wood gas are burned separately from each other. This results in a 50 percent higher efficiency compared to the normal log boiler, but wood gasifiers are more expensive to buy.