Reference Guide

Relative humidity specifications
Table 16. Relative humidity specifications
Relative humidity Specifications
Storage 5% to 95% RH with 33°C (91°F) maximum dew point.
Atmosphere must be non-condensing at all times.
Operating 10% to 80% relative humidity with 29°C (84.2°F) maximum dew
point
Temperature specifications
Table 17. Temperature specifications
Temperature Specifications
Storage –40°C–65°C (–40°F-149°F)
Continuous operation (for altitude less than 950 m or 3117 ft) 10°C–35°C (50°F-95°F) with no direct sunlight on the
equipment.
Fresh air For information about fresh air, see Expanded Operating
Temperature section.
Maximum temperature gradient (operating and storage) 20°C/h (68°F/h)
NOTE: Some configurations require a lower ambient temperature for more information, see the Standard operating
temperature specifications.
Particulate and gaseous contamination specifications
Table 18. Particulate contamination specifications
Particulate contamination Specifications
Air filtration Data center air filtration as defined by ISO
Class 8 per ISO 14644-1 with a 95% upper
confidence limit.
NOTE: This condition applies only to data center environments. Air filtration requirements do not apply to IT equipment
designed to be used outside a data center, in environments such as an office or factory floor.
NOTE: Air entering the data center must have MERV11 or MERV13 filtration.
Conductive dust Air must be free of conductive dust, zinc
whiskers, or other conductive particles.
NOTE: This condition applies to data center and non-data center environments.
Corrosive dust Air must be free of corrosive dust.
Residual dust present in the air must have a deliquescent point less than 60% relative humidity.
NOTE: This condition applies to data center and non-data center environments.
Technical specifications 17