"220V Cooling Fan" when a radiator or other device with a fan, you can refer to the intended use of the time and work intensity sufficient to select the "longevity" products. Cases for just a rough estimate: Under normal circumstances, a life of 10,000 hours of fan, as part of the computer cooling system to work 10 hours a day with your computer, you can use the 1000 days without fault, that nearly three years, to meet the basic "220V Cooling Fan" needs. If the boot continued to run, you can not fault the use of about 417 days, less than 14 months, is obviously not the ideal choice, but should be based on the expected time server, select a longer product life, such as more than 40,000 hours. In addition, should the appropriate "discount" according to environmental conditions. As in the previous life of 10,000 hours in the "220V Cooling Fan" If the larger dust environments, impairment should be changed around 6000 hours. Should be selected so the actual life of more than 15,000 hours of product.