The Vent-Bettina 360° rotational fan is thoughtfully designed with its arms gently upward curving. The fan offers fluid lines and quiet axial rotation with motor heads which can be infinitely positioned in 180-degree arcs for optimum air movement; the greater the angles of the motors to the horizontal support rods (up or down), the faster the axial rotation. A slow, controlled axial rotation is achieved by both fan head position and fan blade speed. Matthews 360° rotational fans circulate heat and air conditioning more efficiently than traditional paddle fans. Constructed of cast aluminum, heavy spun and stamped steel, the Vent-Bettina carries a limited lifetime warranty.