A fan is a home appliance that consists of a set of blades that spin within a cage to create air circulation in the home. The cage is usually fixed to some sort of base for stability. Many fans have about three speed settings that control the speed of the fan blades. Some fans oscillate to further facilitate air circulation.

A fan can be useful for moving air around your house and creating a cool pleasant environment. It also helps to create white noise which can cover up other nosies and help you get a better night's sleep.

South Korea has an urban legend that leaving a fan on while sleeping can cause death by suffocation or hypothermia. The belief is so common that South Korean fans are equipped with timers that can be set when a person goes to bed.