The direction of air flow is from front-to-back.
Figure 5: Air Flow in the Cisco ASR 920 Series Routers
To ensure adequate air flow through the equipment rack, it is recommended that you maintain a minimum
clearance distance as mentioned below, at all times.
•
front clearance
—
12.7 cm
•
rear clearance
—
14 cm
Note the following points:
Cisco ASR-920-12SZ-IM Aggregation Services Router Hardware Installation Guide
25
Preparing for Installation
Air Flow Guidelines