Ondol is a traditional Korean heating system that has been used for centuries. It involves a network of flues beneath the floor, where hot air from a fire or stove circulates, warming the living space. This method provides even heat distribution and is energy-efficient, making it popular in Korean homes. The ondol system is often associated with traditional Korean architecture, where rooms are designed with raised floors to accommodate the heating system. It not only keeps homes warm during cold winters but also creates a comfortable environment for sitting and sleeping on the floor, a common practice in Korean culture.