A Squirrel Cage Fan works in large spaces or in areas where space may be limited to circulate, move or remove air. A ceiling fan will be used within the home in open rooms with higher ceilings to circulate air when heating or cooling is not necessary. They do this by spinning with airflow moving across the blades in either direction. An industrial-grade ceiling fan is used to move air through traditional methods of lifting the blades. A squirrel cage fan moves air by rotating not lifting. They will both use an AC motor but industrial-grade ceiling fans are usually for standard electrical systems. Squirrel cage fans are normally used on heavy duty industrial strength single or three phase power supplies.