Ondol

Ondol is called Gudeul in pure Korean. Gudeul is a heating method with a deep origin that can be found even in Neolithic ruins. Gudeul's principle is basically the use of the conduction of heat. In other words, heat is applied to the large Gudeul under the floor and heated with the heat emitted by heated stones. The structure of Gudeul can be divided into a kitchen furnace, the Gudeul in a room, and a chimney facing the yard. When a fire is made in the furnace, the flame moves along the Gudeul, warming the room floor, and finally, the smoke escapes through the chimney. Gudeul was widely used in hanok because it heated the room indirectly and the internal environment remained pleasant, and because it was an effective way to solve both cooking and heating at the same time.

Maru

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• Maru refers to a floor finished with planks, and floor joist is the basic skeleton of Maru. The checkered Maru, which can be easily found in a hanok, is a Maru whose floor joist and floor boards are shaped like the Chinese character ‘well'(井). Checkered Maru is completed by first aligning the skeleton with the long floor joist and the common floor joist, and then inserting the floor boards in the grooves of the floor joist in order from the end. The long floor joist hangs between the front and rear pillars, and the common floor joist is a short floor joist installed at right angles between the long floor joists.