What is passive ventillation?

Answer 1

Passive ventilation is a system of ventilation which requires no mechanical parts. for example, one could ventilate a room using a powerful exhaust fan, and that would be mechanical ventilation. Or one could simply open a couple of window's that would be passive ventilation.

Answer 2

Passive ventilation is a natural method of ventilating an indoor space by using airflow and pressure differences to exchange air without the need for mechanical systems. This can be achieved through windows, vents, or other openings to allow fresh air to enter and stale air to exit. It helps improve indoor air quality and reduces the need for artificial cooling or heating.