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A ceiling fan is a home appliance that is a common feature in almost all households. When you have installed a ceiling fan that is ideal for room size, you can be assured of air circulation and breeze that would keep you cool and comfortable even on a hot and humid day. There are several manufacturers of ceiling fans. The performance of the fans may vary depending on the quality and technology that the manufacturers have adopted.
How does the ceiling fan work?
The main parts of the ideal ceiling fan are the motor, the blades, and the capacitor. The capacitor torques up the electric motor and makes the fan to start and run. The electrical current from the capacitor reaches the motor, enters the coil of the wire that is wrapped around a metal base. The current that passes through the wire causes a magnetic field. The force is expended in a clockwise direction and changes the electrical energy into mechanical energy. This would cause the motor coil to spin. The spinning motion is transferred to the fan blades. The breeze that is created then speeds the evaporation of sweat on your skin and makes you feel comfortable.
What is RPM?
RPM is the short form for revolutions per minute, and it refers to the rotational speed or frequency of rotation of the blades of the ceiling fans. The RPM and air-delivery are the factors that determine the effectiveness of the ceiling fan. At the same time, air delivery is measured in cubic meters per minute. The speed of the fan is determined by the RPM. However, there are certain restrictions on the speed of the ceiling fans. The UL standards are meant to prevent manufacturers from making high- speed ceiling fans that are over and above the standards.
How does RPM affect airflow?
The amount of airflow that a ceiling fan produces is influenced by how fast the fan blades spin. However, the RPM alone does not produce airflow. The aerodynamics of the blades is an important consideration. If the fan blade is flat and straight, it will not generate enough airflow no matter what its RPM is. At the same time, the blades that are pitched at a 15-degree angle would move air, but the RPM would be slower because of the angle of the blade that puts a drag on the motor when the blades function. Therefore, it is important to determine the airflow that the fan would be able to produce when operating at a particular RPM both to choose an effective ceiling fan and save costs on energy to power the fan.
There are limitations regarding RPM’s at which a fan can spin. It is relative to the thickness of the blades. As per the standards, thinner blades are not allowed to spin as fast a the thicker blades, and therefore the RPM of a ceiling fan with thin blades would be less than those with thick blades. There is a table that lays down the maximum and minimum RPM for ceiling fans with blade spans ranging from 24”-84”. The RPM that meets the standards is an ideal measure.
