The Comfort and Efficiency of Ondol Heating.
Ondol, a traditional Korean underfloor heating system, has been used for thousands of years and has evolved to become part of the building itself. The system uses serpentine channels to circulate hot combustion products from the furnace, allowing their heat to transfer into the structure of the floor and radiate into the space above. While it may be an expensive build, it is an energy-efficient option for those who wish to live in simpler locations.