The rear of the front chassis panel "24V DC Cooling Fan" was primarily responsible for providing the cold air inside the chassis. Most chassis panel consisting of at least one surf the web baffle design, and the fan behind the hard drive cage position. It requires a large pressure type of "24V DC Cooling Fan" can blow through the front of the chassis, which will inject a steady stream of cold air inside the chassis. The inclination angle of the fan blades and blade curvature of the two factors that affect the value of a fan pressure in large city. The inclination angle of the blades and the greater curvature values, at the same rotational speed, the greater the pressure supplied. This "24V DC Cooling Fan" is particularly suitable for use in the front of the chassis, as the intake fan to use.