Ensure that inlet air enters at the front of the server and exits from the back.
Ensure that ventilation openings such as cabinet doors, for both the inlet and exhaust of the server, provide a minimum open area of 35.5 in.2 (231 cm2) each. This size equates to a 60% open area perforation pattern across the front and rear area of the server 17.4 in. x 3.4 in. (442 mm x 87.1 mm). You must evaluate the impact of other open area characteristics that are more restrictive.
Ensure that front and rear clearance of the server allow a minimum of 0.2 in. (5 mm) at the front of the server and 3.15 in. (80 mm) at the rear of the server when mounted. These clearance values are based on the inlet and exhaust impedance (available open area) stated in the third bullet assume a uniform distribution of the open area across the inlet and exhaust areas. These values also improve cooling performance.
Note - The combination of inlet and exhaust restrictions such as cabinet doors and the spacing of the server from the doors can affect the cooling performance of the server. You must evaluate these restrictions. The server placement is particularly important for high-temperature NEBS environments where the server inlet ambient temperature is 131°F (55°C).
Take care to prevent recirculation of exhaust air within a rack or cabinet.
Manage cables to minimize interference with the server exhaust vent.
Ensure that air temperature rise through the server is no greater than 68°F (20°C).