A ceiling fan is a mechanical device that is used to circulate air in a room or area. It typically consists of a fan blade or blades that rotate around a central motor, which is mounted to the ceiling. The fan blades draw air up and away from the floor, creating a cooling effect. Ceiling fans can be used to cool a room during the summer months, or to circulate warm air during the winter months. They can also be used to reduce humidity levels in a room, or to provide a gentle breeze in a room. Ceiling fans come in a variety of styles and sizes, and can be used in both residential and commercial settings. They are a great way to save energy, as they use less electricity than air conditioning systems.