In summary, fan life can be defined using the L10 life method. This method is directly based off of the bearing life therefore protection of the bearings is crucial. L10 life is defined as the number of hours that 90% of a group of fans will complete or exceed without failure. To increase life, there are a few options to choose from. These options are: decrease the ambient temperature experienced by the fan, use a long life fan alternative, or reduce the operating time or speed of the fan. To make sure one extends the fan operation as long as possible, make sure to choose a fan appropriate for any environmental factors. Sanyo Denki offers multiple specialty fans for water, dust, temperature or oil protection from these harsh environments. Finally, make sure to properly handle fans at all times. This includes during shipping, installation and when in operation. With these considerations taken, the customer can increase the life of the device and prevent any premature failures of a fan.