Ruijie Networks RG-N18010, Hardware Installation And Reference Manual

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Note: 
Exhaust vents for power modules

Exhaust vents for switch fabric modules

Exhaust vents for service and supervisor
modules
For the supervisor and service modules, air flows across the chassis from the right intakes to the back vents.
For the power supply modules, air flows in from the front intakes and out from the back vents.
For the switch fabric module, air flows across the chassis from the front intakes to the back vents.
The chassis should be mounted in a place with sufficient space for air circulation. Sufficient space (10 cm at
least) must be reserved at the air intakes and exhaust vents for ventilation.
If any module slot is unoccupied, install a filler panel to enable proper airflow.