Sirocco Fan A sirocco fan is a centrifugal fan with a forward curved blade.It is used for low pressure but with a large discharge use. Theoutlet port of this fan may have a rectangular shape and it issometimes contained in the air conditioning apparatus. Indeed,a forward curved vane can give large angular momentum to thefluid, but it cannot make for better efficiency. The original Sirocco cabin fan introduced the world to a unique gimbal design allowing for 360° directional airflow. Building on the popularity of the Sirocco, the Sirocco II includes increased durability, combined 12 and 24 volt capability, improved user interface and increased timer settings. Features include Unique gimbaled design Timer indicator lights and automatic dimming 360° Airflow Ultra Quite Operation Low Power Draw Combined 12 & 24 volt capability Three speed push button control Improved user interface with LED Timer Display Bar Increased Durability Stylish design available in a black or white finish Easy