"24V DC Cooling Fan" choose a suitable fan is not difficult, using a fan inside the chassis it is undoubtedly the two, one is one is the amount of wind pressure. Large wind pressure fan for CPU and chassis front panel and is equipped with an air filter and a hard disk rack chassis. Winds of fan or rear of the chassis for the top position, so you can rule out the heat, does not cause heat accumulation. Choose a suitable fan is not difficult, "24V DC Cooling Fan" to use the fan inside the chassis is undoubtedly the two, one is one is the amount of wind pressure. "24V DC Cooling Fan" big pressure fan for CPU and chassis front panel and is equipped with dust screen and hard drive rack chassis. Winds of fan or rear of the chassis for the top position, so you can rule out the heat, does not cause heat accumulation.