← All glossary terms

Land, Permitting, and Environmental

Zoning

Zoning is the local land-use classification and rule set that determines permitted uses, dimensional standards, procedures, and conditions. Data centers may require industrial zoning, special approval, or text amendments depending on the locality.

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Firm service

Firm service is service with higher priority and fewer curtailment rights than interruptible or non-firm service. Data center users usually need firm service for critical load, but some projects may combine firm and interruptible blocks for economics.

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RDHx

Rear Door Heat Exchanger is a heat exchanger mounted on the exhaust side of a rack to remove heat before it enters the room. It can help densify air-cooled or hybrid deployments without fully converting to direct liquid cooling.

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Load study

Load study is a utility analysis of whether the system can serve a proposed customer load under planning and operating criteria. It may evaluate thermal limits, voltage, fault duty, protection, contingency performance, and required upgrades.

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