Dell PowerEdge T20 Owner's Manual page 78

Relative Humidity (maximum)
Operating
Storage
Maximum Vibration
Operating
Storage
Maximum Shock
Operating
Storage
Altitude
Operating
Storage
78
20% to 80% (non-condensing)
5% to 95% (non-condensing)
0.26 G
rms
2.20 G
rms
40 G
105 G
–15.20 m to 3048 m (-50 ft to 10,000 ft)
NOTE: In compliance with the requirements
of the official Chinese standards, the
operating altitude for systems shipping in
China is in the range of –15.2 m to 5000 m
(–50 ft to 16400 ft).
NOTE: For altitudes above 2950 ft, the
maximum operating temperature is derated 1
ºF/550 ft.
–15.20 m to 10,668 m (-50 ft to 35,000 ft)