EC Fan

HUMIDIN CENTRIFUGAL PLUG FAN BACKWARD / AEROFOIIL 

HVAC (HEATING, VENTILATION, AND AIR CONDITIONING): EC (ELECTRONICALLY COMMUTATED) fans are advanced types of fans that integrate a permanent magnet synchronous motor (PMSM) with an electronic controller. The motor itself operates based on a combination of direct current (DC) and alternating current (AC) electricity, which is managed by the controller.