Natural ventilation is the process of supplying and removing air from a building or space without the use of mechanical systems such as fans or air conditioners. This method relies on passive airflow, often utilizing wind pressure and temperature differences to create natural air movement. Natural ventilation is often used as a sustainable and energy-efficient alternative to mechanical ventilation systems, helping to improve indoor air quality and reduce energy consumption. Researchers in this area study various factors such as building design, air flow patterns, and environmental conditions to optimize natural ventilation systems for different types of buildings and climates.