← All glossary terms

Cooling and Water

CRAH

Computer Room Air Handler moves air across chilled-water coils to cool data center spaces. CRAH systems depend on chilled-water infrastructure and are common in larger facilities where centralized cooling plants are used.

Explore more terms

Wetlands

Wetlands are aquatic or saturated areas that may be regulated under federal, state, or local programs. A wetland constraint can affect developable acreage, mitigation cost, permit timeline, and transmission or access routing.

Read definition →

VRLA battery

Valve-regulated lead-acid battery is a sealed lead-acid battery type historically common in UPS systems. It is familiar and relatively low cost, but it has space, weight, replacement, temperature, and maintenance tradeoffs versus lithium-ion systems.

Read definition →

Stormwater management

Stormwater management covers how runoff from roofs, roads, parking, substations, and graded land is collected, treated, detained, or discharged. Large data center campuses can create significant impervious area and drainage obligations.

Read definition →