Good morning Ladies and Gentlel men, and all attendants. To day I would like to present to you about: Heat Transfer of Characteristic Thermosiphons. A Case Modifying The Inclination Angle of Evaporator and Condenser Sections. Members in this research are Dr. Narong and me Kittipon Khaongam, we from Rajamangala University of Technology Isan Khonkaen campus Thailand.