How to calculate data center cooling requirements As data centers became more aware of energy-saving techniques and efficiency, ASHRAE developed classes that outlined the environmental and energy impact better. Previous versions focused on reliability and uptime rather than energy costs. A4 applies to PCs, storage products, workstations and volume servers and has the broadest range of allowable temperatures and humidity. A1 equipment refers to enterprise servers and other storage devices that require the strictest environmental control. dew point of -9 degrees C to 15 degrees C (15.8 to 59 degrees F) andÄetermining the proper environment for IT equipment depends on its classification (A1-A4), which is based on the type of equipment it is and how it should run, in descending order of sensitivity. ![]() temperatures between 18 and 27 degrees C (64.4 to 80.6 degrees F).In the most recent guidelines, ASHRAE recommends that IT equipment be used with the following:
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