Despite the efforts to produce low power microcontrollers, the inescapable fact is that the movement of charge carriers in a substrate generates heat. In most systems, particularly those that employ an enclosure, some form of forced air cooling will be needed to remove that heat from the system and keep electronic components running at their ideal operating temperature. While conduction of heat away from components might work for some applications (for example via heat sinks), the fact remains that designs that consume as little as 25 W of power may require forced air cooling, especially once an enclosure becomes involved. Therefore, selecting the right fan for the job is crucial as its efficiency and effectiveness can greatly impact the lifespan of a system and prevent component failure.