| Requirement | Operational | Storage | Transit (Up to 1 Week) |
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|---|---|---|---|---|---|
| Temperature (dry bulb) a | Allowable b: 15° to 32°C (59° to 90°F) Recommended c: 18° to 27°C (64.8° to 80.6°F) |
5° to 45°C (41° to 113°F) |
-40° to 60°C (-40° to 140°F) |
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| Moisture | Allowable: 20% to 80% (Relative humidity non-condensing) Recommended c: Low-end moisture: 5.5°C DP (41.9°F DP) High-end moisture: 60% RH and 15°C DP (59°F DP) |
8% to 80% non-condensing |
5% to 95% | ||
| Maximum dew point | 17°C (62°F) | 27°C (80°F) | |||
| Maximum altitude b | 3050 m (10,000 ft) | ||||
| Gaseous and Particulate Contamination | Gaseous contamination: Copper reactivity rate less than 300 Å/month. Silver reactivity rate less than 200 Å/month Particulate contamination: ISO 14644-1 Class 8 (Data center air continuously filtered by MERV 8 filters and air entering the data center filtered by MERV 11 or, preferably, MERV 13 filters) |
See Operational information | |||
| Vibration limit | Operational vibration depends on the type of component in the cabinet. The operational vibration limit for a typical node is 0.26G (rms) at 10-500 Hz. The operational vibration limit for a typical disk component is 0.28G (rms) at 5-500 Hz | ||||
| Static discharge limit | 4000 V direct discharge, 8000 V air discharge | ||||
| a Operating temperature and moisture level are measured at individual chassis inlet. b Due to lower air density at higher altitudes, the maximum dry bulb operating temperature is derated linearly by a value of 3.3° C per 1000 m (1.8° F per 1000 ft) between the altitude of 900 m (2952 ft) and 3050 m (10,000 ft). c The allowable environmental envelope is a statement of functionality of the equipment. The recommended environmental envelope is a statement of reliability. Operating equipment near the allowable limits for long periods of time could result in increased reliability issues. |
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The purpose of site environmental control is to meet the following specifications to prepare for equipment placement, floor layout, and airflow delivery requirements, as follows: