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non-heat-producingsurfacesuchasawall.Forthecoolingsystemtofunctionproperly,
the airflow around the chassis must be unrestricted.
Figure11onpage43showstheairflowinanEX2200switchwithnetworkportsinwhich
PoE is available. Figure 12 on page 43 shows the airflow in an EX2200 switch with
network ports in which PoE is not available.
Figure 11: Airflow Through PoE Models of EX2200 Switches
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Chassis rear
Chassis front
Fans Fan
Figure 12: Airflow Through Non-PoE Models of EX2200 Switches
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Chassis rear
Chassis front
Fans
43Copyright©2010,Juniper Networks,Inc.
Chapter5:Mounting andClearanceRequirements