Ondol is the Korean floor heating system. Traditionally, the heat of a fire is directed through flues under the floor to heat the room. Nowadays, in most modern homes hot water runs through pipes in the floor. Ondol is the predominant heating system in all Korean homes, even modern apartments.DADASI ONDOL. IND., was found in August 2006, obtained a patent as a brand named DADASI ONDOL and grew steadily. Our products are essential construction materials to increase energy effiency more than 30% in construction market. Those are metallic ondol slab that improve traditional ondol heating system(our contry cultural heritage) modernly. Our products make contry house, wood house, earth house, log cabin, apartment, shopping district, detached house and so on to be remodeled and constructed, Those are easy to be constructed from yellow soil room to yellow ondol jjimjilbang(Korean dry sauna).