pro-government
Ancient Korean Heating System Still Warms Homes Today
While heating in many parts of the world is mainly associated with radiators, stoves, fireplaces, and warm air from air conditioners flowing through a room, in South Korea, centuries ago, they knew how to heat an entire room without a stove in it. While the outside temperature dropped to minus 20 degrees, stone floors were so warm that it was pleasant to sit on them. The secret lay beneath the floor, in a system called ondol (“on-dohl”, which literally translates to “warm stone”).
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