The Vent-Bettina rotational fan by Matthews Fan Company has dual fan motors that are supported on arms that curve in a subtle upward stroke. Its 42 diameter makes it perfect for medium sized rooms. The 13 fan heads can be adjusted up or down to any position for optimal air movement. The entire fan rotates while the fan motors operate. The Vent-Bettina is constructed of cast aluminum and heavy guage stamped steel. It includes a Lutron Skylark wall control. Airflow is 4994 cubic feet per minute on high speed. Please note the bronzette finish shows the fan with metal safety cages which is an upgraded feature; decorative safety cages will ship with that fan as shown on other finishes unless safety cages are requested. Damp location rated. This fan is offered in a number of other finish options. Please inquire for more information.