Dell PowerEdge C6220 Getting Started page 18

Altitude
Operating
Storage
Airborne Contaminant Level
Class
Getting Started With Your System
-15.2 to 3,048 m (-50 to 10,000 ft.)
-15.2 to 10,668 m (-50 to 35,000 ft.)
G1 as defined by ISA-S71.04-1985
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