Answer:
To cool things down, obviously...
Step-by-step explanation:
To be more specific,
The function of the blower fan is to provide ventilation or air circulation for appliances or buildings that need air flow.
A blower fan uses a high-speed impeller or rotor to increase the velocity and pressure of air or gas. A blower fan can vary in size and power depending on the application. A blower fan moves air or gas against a resistance caused by ducts, dampers, or other components in a system.