Wall mounted fans are basically a modification in the table fans as these devices come with a more powerful motor than the table fans. Along with an oscillation switch built for the fan to have a maximum possible reach from one end of the room to the other. The most important modification made is the base of the fan which is modified from being able to be placed on the table top to being able to be screwed or bolted to a wall.
The reason of wall mounted fans recent popularity
The wall mounted fans became popular in this century because of the changes in architecture which led to the low ceiling walls in our rooms and which in turn was the cause of the ceiling fans to become dangerous as when placed at a lower height they may cause serious injury to any person unfortunate enough. Mounted fans came in as the substitute for the ceiling fans for such low ceiling rooms as they were safer than the ceiling fan in these rooms. Their blades are encased and thus they cannot hurt anyone unless anyone is stupid enough to put his fingers inside the casing. These could be easily put up and taken down. They are lightweight and easy to carry around. These devices don’t require much of an effort or equipment to be put up unlike the ceiling fans which require special arrangement to be installed. They are found to be more energy efficient than the ceiling fans.
Mechanism of wall mounted fans
The wall mounted fans are as stated a modification of the table. The blades are sometimes modified to resemble more like cooler exhaust blades to suck in more air and provide strong gusts of air on the receiver’s end. These very blades are mounted on the rotating shaft of the motor. The motor which was generally used was the single phase induction motor but in the recent times research is going on and BLDC motors are being used these days because apart from being energy efficient these motors due to the presence of electronics provide the user many lucrative options like sleep mode, timer etc.
When these fans are placed on the walls these suck in air from the back of their blades and throw them in the front while oscillating from one end to the other supplying air from one end of the room to other covering more area. The air in the room gushes to take the place of the air that has been sucked by the blades of the fan. This method although provides efficient circulation of air but it doesn’t improve the quality of air being circulated which keeps on deteriorating and there reaches a point when the circulation of air is not felt because same air is being circulated again and again and that gets heated up.
The studies have shown these fans work best when used with a ventilator and even better when there is an exhaust on the ventilator. The ideal position is to place this fan in front of a window from where it can suck the air from outside which would be fresh and circulate it in the room and the hot air which rises would be thrown out of the room via the ventilator by the exhaust. Thus, the air quality remains good and there is efficient circulation of air.