Kiln Dried Birch Firewood Barrow Bag Our Kiln Dried Birch Logs fit most wood burning stoves and within the bag you will get a mixture of log widths which are all up to a maximum 25cm (10inches) in length. All our logs have been kiln dried to below 18% moisture content which will give you a long slow burn with maximum heat output and low emissions. One Tree Planted with every order. Ready to Burn certified the UK Government stamp for firewood. Save 5% using our subscription packages & ensure you get priority in the busy heating season. Low moisture content less than 18% Sourced from FSC approved sustainable woodlands Approx Length of Logs: 25cm (10 inches) Approx Diameter of Logs: 5-15cm  Delivery within 2-3 working days Express Delivery 1-2 working days Approx per bag .15 m3  Bag sizes 35cm x 40cm x 85cm or 45cm x 45cm x 60cm