Dell Vostro 270 (Late 2012) - Manual (Page 50)

Environmental
Relative humidity 20 % to 80 % (noncondensing)
Altitude:
Operating –16 m to 3048 m (–50 to 10,000 ft)
NOTE: For altitudes above 2950 feet, the maximum
operating temperature is derated 1ºF/550 ft.
Storage –15.20 m to 10,668 m (–50 ft to 35,000 ft)
Airborne contaminant level G1 as defined by ISA-S71.04–1985
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