Having an impact on the pressure of air and its velocity, the duct fans throw the air upwards or in forward motion. There are many functions of duct fans but the most important one is removal of fumes, dirt-laden air, steam, hot air and smoke, etc. It is commonly used in many industries or places where such problems are encountered. The advantages of duct fans are many along with its ability and efficiency to supply air for cooling, drying and ventilation. The duct fans are seen in areas like fan packs, aircrafts, airships, airboats, hovercraft, etc.
As they are far more efficient at higher rotational speed in comparison to conventional propeller duct fans are considered to be better. At higher air speeds, they can operate efficiently as through the fan, the designing of duct fan can adjust the air velocity. A ducted fan has a smaller diameter enhancing its advantages for the same static thrust in comparison to a free propeller.
They shield the blade noise hence they are quiet by reducing the tip speed and intensity of the tip vortices, and this is one more major advantage to the kitty of duct fans. On the ground also, they offer more safety. Although some design parts are common, the fan manufactures design fans on the basis of different needs. An odd number of blades are there in ducted fans to prevent resonance in the duct.
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