EC fans are essentially fans with brushless DC motor, combining the advantages of AC and DC power. With the power transformation and controls achieved by built-in PCB board, the fans retain the high efficiency of a DC brushless fan without need of an AC to DC supply. Unlike traditional AC fans, EC fans have a wide operating range, the output and energy usage will remain relatively linear when speed is slightly increased or decreased. Thus, EC fans are the most energy efficient fans on the market and the ideal solution for cooling electronic devices, like data centers, vehicles, and any components that dissipate a lot of heat.