Rectangular Brash Kiln
Combe Technologies
£750
Price read from Combe Technologies on 2026-10-15. Check before buying.
Our brash kilns are an affordable way to produce biochar at a medium-scale. Simply light a fire in the bottom of them and add brash from your garden, woodland or hedgerow. It can make use of greenwood. The steam leaving greenwood can in turn help to clean out the pores of the resulting biochar, improving its structure. By continually adding brash to the top of the kiln, oxygen is removed underneath and thus pyrolysis takes place. Once the kiln is full of charcoal, simply let it burn down until only charcoal is present, then douse it with some water and shovel it into open top 200L oil drums. O
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