Everybody calls these CRACs. Half the time they’re not. And if you’re planning an AI retrofit, getting that distinction wrong can send you down the wrong mechanical path. CRAH vs CRAC is one of the most common mix-ups we run into, and it’s an understandable one. Both units sit in the data center doing the same basic job, both look similar from the front, and both show up in the same conversations about room-level cooling. But they’re mechanically different machines, and which one you have (or which one you’re specifying for a new build) changes how your facility scales, how it fails, and what it costs to run.
