Different inlet and outlet will cause great changes in air flow resistance, of course, the bigger the better entrance opening. Not in the vicinity of the air inlet "24V DC Cooling Fan" barrier placed objects (such as chips and interfaces, etc.), otherwise it will reduce the fan air flow. "24V DC Cooling Fan" is preferable to use rubber to fix the fan, rather than metal screws to avoid vibration. "24V DC Cooling Fan" space design. For the fan efficiency, noise, and we must ensure that the fan housing from the fan is 5 ~ 10mm. Fan blades must be near Tongue in order to obtain a better efficiency.