A fan is a machine used to create a flow of air. It consists of a rotating arrangement of vanes or blades, which act on the air. The rotating blades move air, increasing its velocity and volume.

Fans are used for a variety of purposes, including:

• Cooling: Fans can be used to cool people, equipment, or buildings. ¹
• Ventilation: Fans can be used to circulate fresh air and remove stale air.
• Exhaust: Fans can be used to remove smoke, fumes, or other unwanted airborne particles.
• Drying: Fans can be used to speed up the drying process.
• Heating: Some fans can be used to circulate warm air.

Fans come in a variety of sizes and designs, from small personal fans to large industrial fans.