The introduction of large diameter, low speed fans addresses both comfort and safety issues by preventing heat-related illnesses, improving winter dexterity, removing slippery condensation from floors, increasing the effectiveness of your ventilation system and reducing noise in your facility, Big Ass Fans® range in size up to 24 feet in diameter and use their immense size rather than speed to move air throughout an entire space, from high ceilings to the floor, and wall to door.