Firewood
Firewood fireplace heating has become more popular recently and you may not be surprised. It is not only environmentally friendly, because it doesn’t pollute the environment, but it is also a renewable source. The use of firewood for heating is currently the cheapest environmentally friendly source of heating, and you can assume that this trend will continue.
Thanks to modern combustion methods the biomass can be effectively exploited and can produce excellent heat value, in comparison with other more expensive fuels.
Oak is the most used fuel and burns slowly with a quiet flame.