A Crash Course in CRAC Cooling

What’s a CRAC? It’s shorthand for Computer Room Air Conditioner, a key component in data center cooling. In this video, SoftLayer “Social Media Ninja” Kevin Hazard gives a basic explanation of how data center CRAC units work, along with a walk-around demonstration of airflow within a hot aisle/cold aisle raised-floor environment. Due to the ambient noise in the data center, Kevin’s explanation had to be “yelled.” This video runs about 2 minutes.

For more on cooling, see our Data Center Cooling Channel. For additional videos, check out our DCK video archive and the Data Center Videos channel on YouTube.

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About the Author

Rich Miller is the founder and editor at large of Data Center Knowledge, and has been reporting on the data center sector since 2000. He has tracked the growing impact of high-density computing on the power and cooling of data centers, and the resulting push for improved energy efficiency in these facilities.

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  1. john

    always love seeing vids like this. thx

  2. 48simple

    This was a good very basic primer on DC cooling. But there is so much more going on behind the scenes I would like to see.

  3. karbonphiber

    force of habit to critique the air distribution architecture in that room but it is not set up to handle high density cooling without task, close-coupled, supplemental cooling. It's also not very efficient at effectively segregating hot/cold air mixing as there is no dropped ceiling to be used as a hot air return plenum, and no form of hot aisle containment.

  4. raj thakral

    liked this --as a very good primer on DC cooling. Agreed that there is lot to criticize but this serves as a good primer. I restrained my self from critique.