As a result of reviewing various documents and existing researches, since the late Goryeo period, the most active period in the Ondol(溫突, Korean floor heating system) facilities is the 17th century. The phenomenological reason was recovering the buildings destroyed by the Japanese Invasion of Korea in 1592(壬辰倭亂]) & the Manchu War of 1636(丙子胡亂), but the underlying cause was an abnormal climate in which a pair of summer and winter cold continued.
In the 17th century, as the Ondol facilities grew rapidly without distinction between regions and classes, the supply and demand of fuel caused economic and natural environmental problems. And a negative and positive view on Ondol was suggested. Since the middle of the 18th century, when the demand and supply of Ondol reached its peak, which could no longer increase, a new awareness of Ondol began to grow. The room was called the Panbang(板房)and the Ondol, depending on the material that made up the floor. It was considered natural to have the Ondol from this time on. The Incan(□火間) and Jo(竈) that were made to burn were started to be recorded as a kitchen, regardless of size and function.
Changes in social awareness of Ondol have led to concerns about heating efficiency. A variety of architectural explorations were conducted. Such a search was later realized in concrete architectural form. There is a double Ondoll structure, and the column spacing is reduced compared to the previous one. The heat buffer space is formed around the Ondol room, and the double window can control the light and the air going in and out.

Abstract
 1. 머리말
 2. 17세기 기후변화에 따른 온돌설치의 급증
  2-1. 궁궐 및 公廨의 온돌사용 증가
  2-2. 사대부주택의 온돌시설 증가와 기후변화에따른 온돌설치의 권장
 3. 18세기 조선사회의 온돌에 대한 인식변화
  3-1. 온돌 증가에 대한 평가
  3-2. 온돌관련 용어의 변화
  3-3. 온돌의 효율성에 대한 재고
 4. 18세기 이후 난방효율 증대를 위한 건축적모색
  4-1. 온돌구조의 개량 모색
  4-2. 난방면적의 축소 모색
  4-3. 공기 완충공간의 모색
  4-4. 다중창호의 채용
 5. 맺음말
 참고문헌

• 정정남(경기대학교 건축학과 연구교수) | Chung Jung-Nam Corresponding Author