Are there other cultures similar to Korea’s Ondol culture?

It only warms the bed partially, but does not warm the entire room.

2. Roman Ondol Culture

It is the method that is most similar to the Korean Peninsula’s Ondol culture.

Because it was not efficient, it was not widely distributed.

3. Korea’s Ondol culture

It is the only ondol system in the world that is widely used even by ordinary people.

Korea is the only place where it has become popular.