These are electronic powered machines which are used to create flow of air by use of blades connected to a motor inside it which propels the blades in direction clockwise or anticlockwise and some have their blades outside while others have blades in the inside of a case or housing which prevents contact with external objects.
Revolving blade fans are made in a wide range of designs and are used in on the floor, table and desk or hung on the ceiling and also some smaller designed fans are found on electronics for cooling the systems ,others are also installed in vehicle engines foe cooling the enclosed system.
Fans use a series of process to perform their work, they do this by converting the electrical energy to mechanical energy to enable the blades to rotate as the motor inside it is spinning, its through this spinning which causes rotation which in turns creates a breeze that speeds up evaporation of sweat in the human skin cooling the body.
As the fans rotate clockwise or anticlockwise, they pump out the hot air which is lighter through the ventilations towards outside which in turn creates a free space and cold air from the outside environment will push in to replace the hot air and if this continues, the process cools the environment.
Fans are not always used for cooling but also used in keeping the house warmth incases of winter or rainy seasons and this is achieved by setting the fan to rotate in clockwise direction which will push cold air up and warm air down.
Fans are less costly machines for keeping you in a cool breeze while still in the house instead of using air-conditioner which despite of being expensive to purchase and install also consumes a lot of electricity, a hectic long day at work can be finished by sitting under a fast rotating fan and enjoying a pleasant breeze around you and still end up paying less for the electricity a one can switch them off when he/she is no in the room.
Fans are a better option incases of improving the airflow in rooms, enhancing room d?cor, removing stale humid air from bathrooms, laundry rooms or kitchens which improve the rooms scent and also makes it better for living, fans improve air quality and reduce the likelihood of mold and mildew growth in the house.
Learning institutions have armed themselves with all types of ceiling fans to increase air supply as some classes may contain large number of student which might not be able for the doors and windows to give adequate air circulation; overheating and stuffy air hinder scholastic success hence there is a need to have constant supply of cold and fresh air to make the learning environment comfortable.
In agriculture, they can be used to facilitate that effective plant germination and growth as they help plants in respiration by providing a better environment.
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