Ondol

Ondol is a traditional Korean heating system that warms buildings by circulating hot air or smoke beneath floor panels. Typically, a smoky fire heats a series of channels made of stone or clay beneath the floor, which then radiate warmth upward, creating a cozy indoor environment. This method efficiently heats rooms while keeping the floors warm, and it has been used in Korea for centuries. Modern adaptations often involve underfloor heating systems, but the ondol concept remains an important part of Korea’s cultural heritage.