The picture provides information about the structure of a home smokery and how it works.
Overall, the first and second stage of a home smokery to produce smokery food places underground level, while the final stage of this process is above ground level.
Looking at the process, the first section of a domestic smokery is an empty chamber under ground with a lid at ground level, which can open to allow fresh air in. After entering chamber, the fresh air pass along a second underground chamber. The second chamber also has a lid at ground level for loading logs in. Thank to the fresh air at the fist chamber and heat, these logs are burn that produce smoke.
Following the next stage, the smoke and heat at the second chamber that go upward through a pipe into a final box, which places above ground level. At the top of this box is suspended meat or fish, which ready to be cooked or preserved by the method of smoking.