Layer 6 — Facility cooling & HVAC

Position in the die→grid hierarchy: the building.

Facility cooling and HVAC: chillers, dry coolers and cooling towers, CRAH and fan-wall units, the facility water loop with its pumps and valves, water treatment, heat reuse, building controls, and fire detection and suppression.

Parts in this layer

• 6.01 Chillers & compressors · 18 companies
  Chillers use a vapor-compression or absorption cycle, built around a compressor, to produce chilled water for the facility's cooling loop.
• 6.02 Dry coolers, adiabatic/evaporative units, cooling towers, fans & motors · 21 companies
  Dry coolers, adiabatic/evaporative units, and cooling towers reject heat picked up by the facility water loop to outside air, driven by fans and motors.
• 6.03 CRAH / CRAC / fan walls / in-row units · 16 companies
  CRAH, CRAC, fan-wall, and in-row units circulate conditioned air across IT equipment in air-cooled halls, using either facility chilled water (CRAH) or an internal refrigerant circuit (CRAC).
• 6.04 Air handling, economizers, filtration · 10 companies
  Air-handling units, outside-air economizers, and filtration equipment that condition and clean the air supplied to air-cooled data center halls.
• 6.05 Facility water loop hardware (pumps, valves, piping, heat exchangers, tanks) · 26 companies
  The pumps, valves, piping, plate heat exchangers, and thermal-storage tanks that move and buffer water between chillers, heat-rejection equipment, and the CRAH or CDU interfaces on the IT side.
• 6.06 Water treatment, reuse, consumption · 9 companies
  Chemical treatment, filtration, and reuse systems that condition make-up water and manage the water a facility's cooling system consumes or discharges.
• 6.07 Heat reuse & district heating interfaces · 10 companies
  Heat exchangers and interconnection equipment that export waste heat from a data center's cooling loop into a district heating network or other end use instead of rejecting it to atmosphere.
• 6.08 Building management, controls, environmental sensors · 22 companies
  The building management system, PLCs, and environmental sensors that monitor and automatically control chillers, air handlers, pumps, and dampers across the facility.
• 6.09 Fire detection & suppression · 16 companies
  Smoke and heat detection systems and fire suppression equipment — agents, piping, and discharge nozzles — that protect the data hall and electrical rooms.

Public plays in this layer

Listed companies with the most part placements in layer 6. Placement count is breadth, not revenue exposure.