An air mover comprising a motor and a plurality of fan blades coupled to the motor. The motor is operable to rotate the fan blades about a blade axis in order to generate an airflow. A housing is disposed about said fan blades and defines a free area through which the airflow can travel. A first end of the housing is proximate to said plurality of fan blades. A second end of the housing has a free area that is unevenly distributed about the blade axis.