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Meet the Ondol, a traditional Korean system for heating one's house (slrpnk.net)

submitted 11 months ago by [email protected] to c/[email protected]

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By placing the fire and chimney on opposite sides of the house and constructing a tunnel between them, heat is pulled through the tunnel, heating the floors and helping distribute heat more evenly.

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[–] [email protected] 4 points 11 months ago* (last edited 11 months ago)

Yes. (Linked article is Korean)

Modern ondol systems use piped hot water. One of the pleasures of being in Korea in winter is finding a literal hot spot to sit or lie on, since the heating is not perfectly even.