Aerodynamically optimised impeller and special guide vanes give you much larger air flows and greater performance when under pressure.
Revolution fans are more efficient, quieter and smaller than traditional duct fans. 
Simply the most efficient duct fan in the world. 

The Revolution EC Vector fan uses the latest state-of-the-art EC technology. The brushless motors are more efficient than traditional motors and at half speed use less than half the power, unlike AC motors. 
Control and protection electronics are built into the fan.