Ceiling fan
A ceiling fan is a mechanical fan mounted on the ceiling of a room or space, usually electrically powered, suspended from the ceiling of a room, that uses hub-mounted rotating blades to circulate air. Ceiling fans typically rotate more slowly than other types of circulating fans, such as electric desk fans. They cool people effectively by introducing slow movement into the otherwise still, hot air of a room. Fans never actually cool air, unlike air-conditioning equipment, they in fact heat the air due to the waste heat from the motor and friction, but use significantly less power (cooling air is thermodynamically expensive). Conversely, a ceiling fan can also be used to reduce the stratification of warm air in a room by forcing it down to affect both occupants' sensations and thermostat readings, thereby improving climate control energy efficiency.
Energy Conservation Program for Consumer Products
In order for consumers to better understand the different energy efficiencies and cost associated with appliance options, appliances must be labeled to give consumers this information. The appliances the must have this label are Ceiling Fans, Showerheads, Faucets, Water Closets, Urinals, Room Air Conditioners, Water Heaters (all types), Pool Heaters, Furnaces and Boilers, Clothes Washers, Freezers, Refrigerator-Freezers, Refrigerators, Heat Pumps, Central Air Conditioners, Dishwashers, and various types of lamps. The label must show the model number, the size, key features, and display largely a graph showing the annual operating cost in range with similar models, and the estimated yearly energy cost.