The wood species we use to make firewood are: Ash, Oak, Birch, Alder, Pine and Fir. Each log can be cut into pieces of 25, 30 or 45 cm, split 4-6 times for 8-15 cm diameter and stacked into 1m³, 1,8m³, 2m³ or 2,2m³ boxes or bags of 9.5 L, 21 L, 30 L, 40 L or 60 Liters.