Dell Latitude E6220 (Mid 2011) - Manual (Page 94)

Environmental
Operating 10 % to 90 % (noncondensing)
Storage 5 % to 95 % (noncondensing)
Altitude (maximum):
Operating –15.20 m to 3048 m (–50 ft to 10,000 ft)
Non-Operating –15.20 m to 10,668 m (–50 ft to 35,000 ft)
Airborne contaminant level G1 as defined by ISA-71.04–1985
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