Temperature range:Expansion of the recommended data center temperature range, which should be taken at the server inlets. They should now be 18 degrees Celsius to 27 degrees (64.4 degrees Fahrenheit to 80.6 degrees), expanded from 20 degrees to 25 degrees (68 degrees Fahrenheit to 77 degrees).
Humidity levels: Data center humidity levels should now be measured by dew point and fall within 5.5 degrees Celsius to 15 degrees (41.9 degrees Fahrenheit to 59 degrees). The previous range was narrower and measured by relative humidity, which ASHRAE decided wasn't as accurate a metric as dew point
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