The aims of the research are to investigate the effect of gable orientation on the artificial ventilation used, and the intensity of artificial ventilation used which is effected by orientation gable. To achieve the aims of the research, mix research method was used in which both qualitative and quantitative research method was used to obtain the more valid, comprehensice and objective findings of the research. The techniques of collecting the data were literature study, observation in which and the instruments of the research used were the data from literature study, questionnaire with likert scale. After the data found, this research showed that the number of orientation of the roof will affect the ability of roof itself to withstand the heat in order not to increase the consumption of artificial artificial excessively based on both the orientation of both ideal and unideal direction at houses laid in Jasari Park Residence Medan. Then, based on a questionnaire using Likert scale, the roof orientation in residential areas shows that North-South and East-West has completely greater intensity in using the artificial ventilation than the roof orientation towards Southeast-Northwest and Southwest- Northeast. This condition occured because this orientation of the roof surface of the building and the sides of the wall are not only higher, and it absolutely reinforce the roofs that are facing in front of the orientation of the sun.