What is the historical / traditional architecture of data center cooling?

Question

Options

• ARack
• BRow
• CRoom
• DBuilding

• A
  13% (6)
• B
  7% (3)
• C
  78% (35)
• D
  2% (1)

Explanation

Room-level cooling (C) is the historical and traditional architecture, where large precision air conditioning units - commonly called CRAC or CRAH units - cooled the entire data center room as a single zone, often using raised floors to distribute cold air. This blanket approach was the dominant design for decades before data center power densities increased and more targeted cooling became necessary.

Row-level cooling (B) is a more modern, efficient approach that places cooling units between or adjacent to rows of racks, reducing the distance air must travel - it came after room cooling. Rack-level cooling (A) is even more targeted and recent, delivering cooling directly to individual racks and representing the latest evolution in precision cooling. Building-level cooling (D) refers to general facility HVAC, which has never been the primary architecture for data center cooling.

Memory tip: Think of the evolution as zooming in - the industry started broad (room), then got more precise over time (row, then rack). Traditional always means the broadest, earliest method, which is the room.

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