Question

Why is a ventilator provided in a room?

Answer 1

A proper ventillation is maintained in a room because of convection currents in air. The process by which impure, warm air inside a room is continuously replaced by fresh air from outside is called ventillation. Breathing by people in a room increases the CO₂ and humidity in air. The moist warm air containing CO₂ is light and hence rises up. It then escapes through the ventillator, decreasing the air pressure in the room. Thus, the fresh cold air from outside flows in. Hence a continuous circulation of air is maintained within the room by convection currents.