Question

Why is a ventilator provided in a room?

Answer 1

Explanation:

1. Proper ventilation is maintained in a room because of convection currents in the air.
2. The process by which impure, warm air inside a room is continuously replaced by fresh air from outside is called ventilation.
3. Breathing people in a room increases the CO₂ and humidity in the air.
4. The moist warm air containing CO₂ is light and hence rises up.
5. It then escapes through the ventilator, decreasing the air pressure in the room.
6. Thus, the fresh cold air from outside flows in.
7. Hence a continuous circulation of air is maintained within the room by convection currents.