A Zikhwa-Gorae(Directfire-Firetunnel) Gudle is composed in the order of Agungi(Fireplace- gate), Agungi-hureongi(Fireplace-in), Bunengki(Fireridge), Gudle-Gaezari(Gudle-Deepplace), Gorae(Firetunnel), Gorae-Gaezari(Firetunnel-Deepplace), Gulduk(Holebank) and Gusae(Chimney ). The detail drawings of a Gudul(traditional Ondol) are showed. Four kinds of the Gudle are Godeon-Gorae(Straight-Firetunnel) Gudle, Doedon-Gorae(Return-Firetunnel) Gudle and Heutn -Gorae(Scatter-Firetunnel) Gudle.