a normal direct-drive motor. A pendulum fan or flap fan is a type of low velocity ceiling fan that can be used for air circulation around a targeted area. The back and forth motion increases turbulence around cooling sources, like chilled waterfalls at the Lavin Bernick Center at Tulane, helping to cool a greater volume of air. Brushed DC ceiling fans. Before the current switched from DC to AC, there were productions of brushed DC ceiling fans. Those are wired directly to DC wires. Brushless DC ceiling fans. This type of fans uses BLDC technology which offers much higher efficiency than normal fans driven with traditional AC motors. These are quieter than AC motor fans due to the fact that they are commutated electronically and use permanent magnet rotors. Among the other advantages, these fans offer are high efficiency, lower noise level, less rotor heat, integration of remote control and other convenience technologies etc. The only drawbacks are the high cost and the presence of complex electronics which may be more prone to failure and difficult to service. However, with the advent of new technologies and better quality control techniques, the latter is becoming less of a concern. Those are wired to AC wires along with AC/DC adaptor. Smart ceiling fans. These fans can be controlled by Google Assistant, Amazon Alexa Assistant, Apple Homekit and Wifi. A vast majority of these fans use BLDC motors due to their microcontroller based design, flexibility in fine controls and firmware upgrade capability. The speed, brightness and timing of the fans can be adjusted with a smartphone app. Effects on Airborne Transmission & Distribution Ceiling fans provide a more affordable and energy-efficient alternative to air-conditioning, especially when used in conjunction with warmer room air temperature. Overall, the use of ceiling fans results in a lesser impact on global warming when looking at carbon generation suppression. In addition to improving thermal comfort and reducing energy consumption from air-conditioning, ceiling fans have been studied as a tool that could potentially affect airborne transmission and distribution. This is important, for the risk of aerosol transmission in poorly ventilated places is much higher as proven by cases in hospital wards, restaurants, and offices. According to an experiment using tracer gas it was found that ceiling fans could reduce the exposure risk of the breathing zone by 20%. Another study found that with better aerosols’ dispersion through mixing air