You can use almost any type of dry, natural wood as firewood. The quality of the firewood is crucial - for the flame pattern, a clean pane and low emissions. We recommend well-seasoned hardwoods such as beech or birch, as these guarantee plenty of embers and a quiet burn.
Softwoods such as fir, spruce, larch or poplar, on the other hand, are best suited as kindling wood. These have a high resin content and a low flash point, which means that heat builds up very quickly.
Fossil fuels (brown or hard coal) or treated wood, on the other hand, have no place in a stove. Wood that is not painted but is pressure impregnated must also not be burnt, as toxic gases are produced. Pressure impregnated wood must even be disposed of as hazardous waste!