Fan (machine)

200px|thumb|An electric fan

Fans are a device used for cooling many things down when they are hot, especially:
 A machine using an electric motor to rotate vanes in order to move air for cooling.
 A tool whose shape is often a long triangle, circle, or semicircle. Made of feathers, leaves, paper, cloth, etc., people usually wave it lightly in a hand to create a cooling current of air.

Types of fans
Table Fans: small size, appropriate for personal space, cheap price, economical cooling
Pedestal Fans: height can be changed, provide powerful air
Window Fans: save space, bring in fresh air
Wall Mount Fans: save space, offer more air, suit for industrial environment 
Floor Fans: offer more air, save space, suit for offices and warehouses
Tower Fans: small space, vertical shape, quiet
Ceiling Fans: on the ceiling, have a lot of styles to match room's decoration
Box Fans: flexible, suit for various need of rooms
Misting Fans: suit for outside areas, creates a mist to increase cooling for hot days
Industrial Fans and Blowers: made of durable metal or steel
Decorative Fans: has a lot of different styles
Bathroom Exhaust Fans: used in bathroom, prevent from excess moisture
Bladeless fans have no visible blades. They are not actually bladeless, the blades are hidden in the base of the fan.

Origin of fans
The fan making history is at least 3000 years long, and the earliest known fans date from 3000 BC, according to the record. Fans were first made in China. The first European folding fans were brought into Europe by businessmen and religious orders from China, and they were considered as a status symbol in Europe.

References

Category:Machines
Category:HVAC
Category:Home appliances