... the fire between the inner part and the external wall, to cook the product and carbonize it, the space which we ... reach 450 we put out the fire, then leave it to cool down for 10 hours, then we open the ... the wood in a traditional way, it needs 24 hours to carbonize; and the gas flow one using the heat of ... the gas cycling inside the stove, as to shorten the producing time, it only need 8 hours ...