This study investigated the potential of wind ventilation systems to improve exergy efficiency in buildings. By applying exergy analysis, the study com-pared the performance of passive and active ventilation systems, focusing on air change rates per hour. The research examined the first floor of a building in Bangkok, evaluating how different ratios of leeward to windward window area, outdoor air velocity, and window height affected exergy input. The findings revealed that buoyancy ventilation achieved the highest air change rate per unit of exergy input, followed by wind-driven and mechanical systems. Effective ventilation was associated with a leeward-to-windward window area ratio between 0.5 and 0.75, which reduced exergy consumption. The tropical cli-mate of Thailand presented unique challenges and opportunities for improving the energy efficiency of commercial buildings.