Airflow Concerns For Closed Racks; Closed Rack Ideal Configuration - Enterasys S Series Hardware Installation Manual

Temperature and Humidity Guidelines

Airflow Concerns for Closed Racks

When placing Enterasys switches into enclosed racks, rack exhaust fans must be considered if the
rack does not contain adequate inlet and exit venting. These fans may be needed to help exhaust
hot air from the rack. They must be sized properly to exhaust the collective volumetric flow from
all equipment within the rack.
Figure E-1
and side-to-side cooled sub-systems are flowing in the same direction.
Cool air ingress through the bottom of the rack must be carefully allowed to enhance overall
system airflow and prevent stagnant air recirculation. This may need to be confirmed through
thermal testing at the installation site.
Figure E-1
Figure Key
E-2 Environmental Guidelines
Note: The SSA switch directs air flow from front to back, not side to side.
illustrates the ideal configuration for a fully vented closed rack. All panels are vented,

Closed Rack Ideal Configuration

Blue arrows indicate cool air ingress
Red arrows indicate hot air egress
White arrows indicate airflow through the
system