Does the horizontal charcoal kiln have an exhaust port?

Yes, it is necessary to leave a vent in the horizontal charcoal-burning earth kiln, because it can make the wood burn normally. Earth kiln refers to cave dwelling. Cave dwelling is an ancient form of living for residents of the Loess Plateau in northern China. In the Shaanxi-Gansu-Ningxia region of China, the loess layer is very thick, some of which are tens of meters thick. The people of China creatively used the favorable terrain of the plateau to dig holes to live, and created cave buildings called green buildings.