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Data Center Temperature and Humidity Range Recommendations

Part of the Green IT For Dummies Cheat Sheet

In consulting with computer manufacturers, the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), changed its recommendations for air temperatures in data centers and computer room humidity. The following chart shows new recommendations for safely maintaining IT equipment.

Humidity Fahrenheit Celsius
High limit 80.6°F 27°C
Low limit 64.4°F 18°C
Maximum relative humidity 60 percent
Maximum dew point 59°F 15°C
Minimum dew point 41.9°F 5.5°C
Dew point depression at 60 percent R.H., 20° 8.5°C 14.3°F
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