Mechanical fans made their first appearance in the 1500s as canvas covered frames called “punkahs” that were hung from ceilings. To create a cooling effect, there were ropes connected to the frame that servants pulled, making the fan move back and forth. Belt driven fans that were powered by factory waterwheels were produced during the 1800s. Electric fans were available to the general public after electric power was introduced. Fans enhanced a home’s decor because they were functional and stylish and equipped with brass blades and cages.
Three types of fan technologies used for air movement are axial, centrifugal and cross flow. The method fans use for climate control and utilized to provide comfort or ventilation is axial flow. Air is forced to move parallel to the shaft by the blades while the blades rotate around it and blow across the axis of the fan. A couple of applications that use axial flows are personal cooling in personal desk fans and giant fans commonly found in wind tunnels. An electric fan’s basic components include the base, fan blade, armature and lead wires, motor, blade guard, motor housing, oscillator gearbox and oscillator shaft. The rating of an electric fan is determined by the types, size and number of blades. The materials from which the fan’s components are made determine the price. The most common fans have four blades. When providing comfort, fans do not actually lower the temperature. They create a wind chill effect.
There are a wide range of designs and many different kinds of fans. Fans can be built into windows, walls, roofs or chimneys, hung from the ceiling, and can be put on the floor or table. Electric fans are used in electronic systems like computers to cool the circuits inside and in hair dryers and space heaters.
The most popular electric fans used in accommodation lodges are :-
Bathroom Exhaust Fans- These electric fans deal with offensive odors and humidity levels, making them vital components of your home. Excess moisture in bathrooms can lead to paint damage, warping doors, and the eventual accumulation of mould spores. Bathroom exhaust fans can come with built-in heater, lights and timer units. They are designed to be mounted on the ceiling or onto the wall.
Portable Electric Fans- These electric fans are fully portable and can be moved from one room to the next. Many different kinds of fans can fit into this category, such as floor fans, pedestal fans and many types of industrial fans. They come is different sizes like the popular 26 inch fan.