For applications where 5 years of life is not sufficient, Sanyo Denki can offer a line of long life fans. These long life fans are rated up to 23 years at an operating temperature of 60°C. The following slides show how Sanyo Denki is able to design fans that have such an extended life rating. To make a long life fan, first one must understand that the bearing life determines the fan life. However, the bearing life depends on the operating temperature and bearing load from the fan. Therefore, to increase fan life, Sanyo Denki has taken steps to reduce the bearing temperature and load.