온돌 is a traditional Korean heating system that has been used for centuries. It involves a network of flues under the floor, where hot air from a fire is circulated to warm the living space. This method not only heats the floor but also provides a comfortable environment for sitting and sleeping. The design of 온돌 allows for efficient heat retention, making it an effective way to stay warm during cold winters. It is often associated with traditional Korean homes, known as 한옥, and is an integral part of Korean culture and lifestyle, promoting a cozy atmosphere in living spaces.