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Cage Diagram Colocation Question about Symbols and abbreviations

Posted on 2013-12-13
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In the attached diagram, what does "Hot Aisle" mean?  "Cold Aisle"?
I know what the cage door is.
err
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Question by:brothertruffle880
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Hot aisle/cold aisle is a layout design for server racks and other computing equipment in a data center. The goal of a hot aisle/cold aisle configuration is to conserve energy and lower cooling costs by managing air flow.

In its simplest form, hot aisle/cold aisle data center design involves lining up server racks in alternating rows with cold air intakes facing one way and hot air exhausts facing the other. The rows composed of rack fronts are called cold aisles. Typically, cold aisles face air conditioner output ducts. The rows the heated exhausts pour into are called hot aisles. Typically, hot aisles face air conditioner return ducts.

Resource :
http://searchdatacenter.techtarget.com/definition/hot-cold-aisle
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by:brothertruffle880
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EXCELLENT explanation.  At first I thought it referred to whether there were power strips underneath the floor tiles.  (Yeesh!   Dumb guess on my part.

Thanks.
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