Dell PowerEdge R415 Systems Guide De Mise En Route page 14

Environmental (continued)
Altitude
Operating
Storage
Airborne Contaminant Level
Class
12
Getting Started With Your System
–16 to 3,048 m (–50 to 10,000 ft)
NOTE:
For altitudes above 2950 feet,
the maximum operating temperature is
derated 1ºF/550 ft.
–16 to 10,668 m (–50 to 35,000 ft)
G1 or lower as defined by ISA-S71.04-1985