What does a heatable adobe sleeping platform look like?

The appearance of heatable adobe sleeping platform is shown in the following figure:

Heated kang is a rectangular platform made of adobe or brick in northern rural areas. There is a cushion above and a hole below, which is connected to the chimney and can be heated by fire. In some places, there will be a stove next to the heatable adobe sleeping platform, which can be used to boil water, but it is generally not used for cooking.

Working principle of heatable adobe sleeping platform

The principle of fire-resistant kang is to use the heat generated by burning wood or coal to heat the kang surface, and the cooled flue gas is discharged from the chimney through the flue. A kang consists of a kang surface and a flue, and the structure of the flue is several lines, which will form what the northeast people call a kang head and a kang point.

The entrance of flue gas is kang, at the end of one kang channel, and the exit of the beginning of the other kang channel is kang tip, which is the place where smoke comes out, which is slightly cooler than kang. Flue gas enters the kang channel from the kang head, transfers heat to the panel through the fire channel and flue, and is finally discharged out of the room through the chimney.