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Why does a fan has odd number of wings?

Fans typically have an odd number of blades to minimize the interference caused by blade passage. Having an odd number of blades helps to create a more uniform airflow and reduces vibrations. This design is also more efficient in terms of airflow and noise generation compared to even-numbered blades.


Do fans give off radiation?

No, fans do not give off radiation. Fans simply move air around to create a cooling effect by increasing air circulation. They do not emit any harmful radiation.


What is the difference between axial fans and propeller fans?

Axial fans are designed to move air parallel to the fan blade rotation axis, making them more suitable for applications requiring high airflow at lower pressures. Propeller fans have angled blades that push air in a specific direction, making them more efficient for moving air over long distances at higher pressures. Overall, axial fans are better for general cooling and ventilation, while propeller fans are ideal for air circulation and ventilation in specific directions.


Ceiling fans rotate anticlockwise while table fans clockwise why?

ceiling fans rotate both ways 'anticlockwise' and 'clockwise' this is so the on fan will pull the air up and another will push it down to create a circulation in the room. Table fans rotate clockwise so they can push the air outward across the room.


Why does a fan need coil and magnet?

Not all fans do need a coil and magnet - there are hand fans, punkah walla fans belt driven fans (as in your car) and Stirling engine fans that I can think of that do not need a coil or a magnet. It is only electrically driven fans that require a coil and magnet because they work on the principles of electromagnetism.