Dell SC420F Owner's Manual page 21

Environmental
Operating
Storage
–16 to 3048 m (–50 to 10,000 ft)
NOTE: For altitudes above 900 m (2950 ft), the maximum operating temperature is
derated 0.56°C (1°F) per 168 m (550 ft).
–16 to 10,600 m (–50 to 35,000 ft)
SC400 Series Expansion Enclosure Technical Specifications
21