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Lesson 5 · 8 min

Data Center Cooling Architectures

Room, in-row and rack-level cooling; CRAH and CRAC units; chilled-water and direct expansion systems; and basic liquid cooling concepts.

Learning objectives

  • Compare room-based, in-row and rack-level air cooling.
  • Explain the difference between CRAH (chilled water) and CRAC (direct expansion) units.
  • Describe where liquid cooling fits and the trade-offs between approaches.

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Educational content only. The Academy is not accredited training and does not issue certificates. Calculations in lessons are preliminary estimates, not equipment selection.