Electric Fan Basics
Mechanical fans first made their appearance in the Middle East during the 1500s. Known as "punkahs," these fans consisted of a canvas-covered frame that was suspended from the ceiling. Servants pulled ropes connected to the frame to move the fan back and forth in order to produce a cooling effect.
Electric fans come in a range of styles and sizes, but most electric fans used in home or industrial settings utilize the same basic technology. There are three main types of fan technologies used for air movement: axial, centrifugal, and cross flow.
As mentioned above, there are several different types of electric fans used for several different purposes besides just cooling. From residential to industrial settings, electric fans such as exhaust and window fans can provide additional ventilation and prevent the inhalation of dangerous gases and fumes and even help with odor or moisture control as found in bathroom fans. Here is a breakdown of the most popular electric fans and their functions: