Views: 0 Author: Site Editor Publish Time: 2026-07-09 Origin: Site
A fan wall (also named air wall) is a modular, aisle-side precision cooling system built with an array of high-efficiency EC fans and integrated heat exchange coils, specially designed for modern high-density server and AI GPU racks.
Instead of cooling the entire data center room like traditional CRAC units, fan walls deliver targeted cold air directly to rack inlets, minimizing cold air waste and eliminating hotspots from power-hungry AI computing hardware.
Two Main Types of Data Center Fan Walls
Standard Large Fan Wall
Full-height wall units installed at aisle ends or along cold/hot aisles, with large single-unit cooling capacity (80–600 kW). It covers an entire row or zone of racks, best for large-scale AI data centers with 100+ high-power GPU cabinets.
Mini Fan Wall (Slim Fan Wall)
Compact, thin modular units (200–600 mm depth) placed between racks or against aisle walls. Single-module cooling ranges from 10–80 kW, ideal for small sites, edge AI rooms and old facility retrofits with limited space.
How It Works
Draw hot exhaust air (40–55°C) out of the hot aisle behind servers/GPUs.
Pass hot air through chilled water, DX refrigerant or dual-source cooling coils to lower air temperature to 24–29°C.
IE5 EC fan arrays push uniform cold air horizontally into the cold aisle, straight to rack front intakes.
Intelligent BMS adjusts fan speed and cooling water flow in real time based on GPU inlet temperature to stabilize operating conditions.
Full hot/cold aisle containment is mandatory to stop mixing of hot and cold air, raising cold air utilization above 90%.
Core Benefits for Data Centers, Especially AI Clusters
Supports ultra-high rack power density
Pure air-cooled fan walls handle 20–70 kW per AI rack; paired with cold plate liquid cooling, they support loads up to 100 kW per cabinet for H200/MI300X clusters.
Superior energy efficiency & low PUE
High-performance variable-speed EC fans cut fan power consumption by 20–30% vs legacy CRAC. Free cooling mode runs in cool seasons, driving PUE down to 1.15–1.25.
Low air loss & stable thermal environment
Direct close-coupled air supply reduces cold air loss from 30–50% (room AC) to under 10%, effectively preventing GPU thermal throttling.
Modular, fast deployment & easy maintenance
Stackable design allows capacity expansion as computing load grows; hot-swappable fans and coils can be replaced without shutting down the cooling system. No raised floor is required for installation.
Common Use Cases
Large-scale AI training/inference data centers with dense GPU rows
Retrofit upgrades for outdated colocation computer rooms
Edge AI computing rooms with limited layout space
Hybrid cooling systems matched with rear door heat exchangers (RDHx) or chip cold plates for extreme-density racks
