Rural areas have shortage of electricity, so natural ventilation becomes necessary. Ventilation through solar chimney harnesses solar energy as energy source and can be installed in rural buildings for improvement of air circulation. Rate of ventilation of a solar chimney for natural ventilation was investigated for both Horizontal type and Vertical type. Ventilation rate greatly depends on the temperature gradient of the room. The current work presents the comparative analysis of a room apartment with solar chimney of both types attached to them. In this study, a reduced scale Chimney of Horizontal and Vertical design is modelled through CFD to investigate the improvement of Natural Ventilation. Two different parameters have been considered for current study viz. Outlet Velocity and Temperature of Absorber plate.