Korea’s traditional ondol system heated a room from below. A fire burned in the hearth, while heat and smoke traveled through underfloor flues to a chimney on the far side, warming the thick floor above. The result was long-lasting radiant heat—one of the defining features of the traditional Korean hanok. More than just a heating method, ondol shaped daily life: people sat, ate, and slept close to the warm floor, making the heated surface itself part of the living space. #Ondol #KoreanArchitecture #TraditionalKorea #FloorHeating ArchitecturalHistory VernacularArchitecture KoreanCulture