In the course documentation i find the following as description of this picture: Hot aisle containment (HAC) guides the hot air (red arrows) into a computer room air handler (CRAH) which then recirculates the flow into cool air (blue arrows).
Seems I'm wrong with CRAH ( can't edit ) and now I feel A is correct ( HAC ). Found a link with the diagram used here: https://www.colocationamerica.com/blog/hot-vs-cold-aisle-containment
Hot Aisle Containment ---- HAC
https://www.datacenter-tech.com/product/Hot-aisle-containment-System.html
upvoted 2 times
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