Airflow Considerations - Fujitsu SPARC ENTERPRISE T1000 Site Planning Manual

Electrostatic discharge (ESD) is easily generated and less easily dissipated in areas
where the relative humidity is below 35%, and becomes critical when levels drop
below 30%.

Airflow Considerations

Ensure unobstructed airflow through the chassis.
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Ensure that inlet air enters at the front of the server and exits from the back.
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Ensure that ventilation openings such as cabinet doors, for both the inlet and
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exhaust of the server provide a minimum open area of 33.3 in.
This equates to a 60% open area perforation pattern across the front (17.5 in. x 3.2
in.) and rear area of the server (445 mm x 81 mm). The impact of other open area
characteristics that are more restrictive should be evaluated by the user.
Allow a minimum of 0.2 in. (5 mm) clearance at the front of the system and 3.1 in.
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(80 mm) at the rear of the server when mounted. These clearance values are based
on the inlet and exhaust impedance (available open area), and assume a uniform
distribution of the open area across the inlet and exhaust areas. Clearance values
greater than these might 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 and should be evaluated by the user.
Take care to prevent recirculation of exhaust air within a rack or cabinet.
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Manage cables to minimize interference with the server exhaust vent.
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Ensure that air temperature rise through the system is approximately 59˚F (15˚C).
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6 SPARC Enterprise T1000 Server Site Planning Guide • April 2007
2 2
(215 cm ) each.