When it comes to AC, DC, EC Motorized Impellers, it may seem that there are many choices, making it hard to know which fan is best. What’s important to know is that for many applications —electronic cabinet cooling, computer rooms, air filtration, fume hoods, heat exchangers, and more — motorized impellers offer distinct advantages over other air movers. Axial and centrifugal motorized impellers are available with AC, DC, and EC motors.