Dell Vostro 3800 Owner's Manual page 36

Environmental
Temperature:
Operating
Storage
Relative humidity
Altitude:
NOTE: V 3800 and V 3900 meet the China
5000 m altitude requirements.
Operating
Storage
Airborne contaminant level
36
10 °C to 35 °C (50 °F to 95 °F)
–40 °C to 65 °C (–40 °F to 149 °F)
20 % to 80 % (non-condensing)
–15.20 m to 3048 m (–50 ft to 10,000 ft)
–15.20 m to 10,668 m (–50 ft to 35,000 ft)
G1 as defined by ISA-S71.04–1985