An electric cooling fan is used in a wide variety of applications, from electrical enclosure cooling fans to industrial cooling fans. These fans are available in a range of sizes and air displacement capabilities. Small cooling fans can be placed in spaces with little clearance. Thermostatic controls determine the operation of equipment cooling fans and are used in equipment ranging in size from computers to automotive engines. Industrial cooling fans may be used with heat exchangers. When choosing an electric cooling fan, consider the environment in which the fan is used and the cubic foot per minute air displacement requirements. The available voltage for the fan determines the motor suitable for the task. Computer cooling fans are typically low voltage. Mounting requirements for electronics cooling may include the use of additional brackets. Small industrial fans may be mounted inside equipment enclosures. Power supplies frequently require the use of an electronic fan.