Abstract: Conventional large area fans generally create a cylinder of air having a diameter that is essentially equal to the diameter of the fan. Larger diameter fans require heavier-duty motors and gearboxes to drive the longer fan blades and are heavier, and thus are more difficult to mount, require heavier-duty mounting fixtures, and are more likely to fall. One large area fan according to this invention forms a cone of air. Some fan blades according to this invention have a relatively straight leading edge portion attached to the fan and a generally curved trailing portion extending downwardly from the relatively straight leading edge portion that interacts with the air to create a conical or cone-shaped flow of air from the fan. Other fan blades have a curved segment and are attached to the fan at theirs leading edges. In some such fan blades, one end is offset from the other end.