In spring and autumn, fresh air is evenly distributed throughout the room from the open window. In summer, Vornado fans create a pleasantly cool breeze throughout the room. Cold air from air conditioners is evenly distributed. In winter, a Vornado fan can help save costs: it evenly distributes the heat from heaters and fireplaces, as well as the warm air that accumulates under the ceiling, throughout the entire room. All models are made from shatter-resistant polystyrene. With a 3-speed adjustment, they adapt perfectly to current needs. The Vornado 633 is ideally suited for medium to large rooms. The airflow it generates has a range of up to 23 meters. A perfect fan for most environments.