An oscillating fan rotates from side to side while blowing cold air out. Because of this movement, it is more effective than a stationary fan. While a stationary fan can only push air straight ahead, an oscillating fan sends air in multiple directions, creating better air flow.Continue Reading
Oscillating fans are driven by a magnet and an electric motor inside the stand itself. When electricity flows into the coils surrounding the fan's inner rotor where the magnet is housed, a magnetic field is created. The central rotor is pushed partway in a circle away from the magnetic repulsion, but then electricity flows into another coil on the opposite side, and the rotor is again pushed in another direction, sending the fan back across its path until the cycle is completed and then repeated.
In some fans, the oscillation isn't from side to side but rather up and down. The basic mechanical process remains the same, only the direction the rotor moves in is altered. Most oscillating fans are best placed strategically in a corner of a room, as from this position they can spread the air out across the greatest area. That being said, many oscillating fans also feature a switch or knob that can lock them in place to focus the air straight ahead in one direction as well, mimicking the style of a conventional fan.Learn more about Heating & Cooling
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A hassock floor fan moves the cooler air near the floor out and up, ventilating a full 360-degree area surrounding the device. A typical rectangular floor fan only blows air out of the sides. This fan was also meant to be used as a footstool, or hassock.Full Answer >
On furnaces, a fan limit switch uses a heat sensor to detect the temperature of the air passing through the valve that the switch is affixed to. Its purpose is to detect when the air in the furnace is warm enough to circulate into a home. Without the fan limit switch, the furnace would blow cold air.Full Answer >