In terms of air systems, what is an example of natural air intake and mechanical exhaust?

The example of natural air intake and mechanical exhaust can be best illustrated by the scenario of a residential home with bathroom and kitchen exhaust fans only. In this context, natural air intake refers to the air that enters the home passively through openings such as windows, doors, or other unsealed areas, relying on pressure differences to allow fresh air in without the use of fans or mechanical systems.

The mechanical exhaust consists of the installed fans in the kitchen and bathroom, which actively draw out air from these areas to eliminate odors, moisture, and pollutants. This combination effectively promotes air circulation: fresh air enters through natural means while contaminated air is expelled mechanically.

In contrast, industrial plants, office buildings, and warehouses may employ more complex systems and controls for air intake and exhaust, often incorporating extensive ventilation systems that do not rely solely on the natural passive intake of air or the basic mechanical exhaust of specific areas.