Marzieh’s PhD project addresses the urgent issue of urban overheating and air quality exacerbated by climate change and urban densification. As global temperatures rise, traditional passive cooling and ventilation measures become less effective, leading to increased reliance on air conditioning, which in turn elevates electricity consumption and societal inequalities. Marzieh aims to develop reliable models of summertime window opening and closing behaviour to predict and mitigate overheating and poor air quality risks in flats, particularly in bedrooms. By monitoring window status and collecting socio-technical data from occupied flats, the research will identify key parameters influencing occupant behaviour. The resulting models will enhance natural ventilation and inform guidelines like CIBSE TM59, ultimately optimizing indoor air quality, thermal comfort, and energy efficiency. This project seeks to contribute to sustainable living solutions amid urbanization and climate challenges, while also highlighting necessary regulations and technical challenges.