← All glossary terms

Cooling and Water

CDU

Coolant Distribution Unit transfers heat between facility cooling loops and IT liquid-cooling loops while controlling flow, temperature, pressure, and filtration. CDUs are becoming a core design component for direct-to-chip AI deployments.

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CIAC

Contribution in Aid of Construction is a customer payment toward utility infrastructure needed for service. For large-load projects, CIAC treatment can be a major economic issue and may have tax, refund, and ownership implications.

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Traffic impact study

Traffic impact study evaluates how a project affects roads, intersections, construction traffic, and long-term operations. Data centers may have low permanent employment but high construction traffic and equipment-delivery needs.

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PDU

Power Distribution Unit distributes power from upstream electrical infrastructure to racks, cabinets, or downstream panels. In data centers, PDU design affects branch-circuit capacity, metering, redundancy, maintenance, and how IT load is allocated across power paths.

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