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.