What type of air exchange occurs through natural means in ventilation?

The type of air exchange that occurs through natural means in ventilation is passive ventilation. This method relies on natural forces, such as wind and temperature differences, to create airflow within a space. It does not use mechanical systems or powered devices to facilitate air movement. Instead, passive ventilation can involve strategic placement of windows, vents, and other openings to allow fresh air to enter and stale air to escape, promoting natural circulation.

This approach is often used in building design to enhance indoor air quality and maintain comfortable temperatures while minimizing energy consumption. By leveraging natural airflow patterns, passive ventilation can be an effective, sustainable solution for achieving ventilation needs without relying on mechanical means.