Tunisia Data Center Hot Aisle 800mm Depth

An 800mm hot aisle depth is narrower than typical standards, but can be implemented with careful design to maintain cooling efficiency and airflow management.

Hot Aisle Containment Overview

Hot Aisle Containment (HAC) is a data center cooling strategy that isolates hot exhaust air from server racks, directing it back to the CRAC (Computer Room Air Conditioning) unit through an overhead plenum or containment system. This prevents hot and cold air from mixing, improving cooling efficiency, reducing energy costs, and enabling higher setpoint temperatures for server inlets.

Aisle Depth Considerations

Standard hot aisle widths typically range from 1. 2 meters (1200mm) or more, allowing sufficient space for airflow, personnel access, and serviceability. An 800mm depth is narrower than standard, which may limit airflow and make maintenance access more challenging.

However, it can still be used if: Cabinet rows are uniform in height and alignment to prevent bypass air. Physical barriers such as sliding doors, vinyl strip doors, or rack hats are installed to maintain containment. Raised floor or slab systems are optimized to deliver cold air precisely to server intakes.

Cooling Efficiency Implications

Narrow aisles can increase the risk of hot spots if airflow is restricted. Proper containment ensures that hot air is funneled directly to the CRAC, maintaining temperature uniformity along the rack height.

HA

C can improve cooling efficiency by 30% or more, allowing CRAC units to operate at higher setpoints and lower fan speeds, which reduces energy consumption. Continuous monitoring with temperature and humidity sensors is recommended to ensure environmental conditions remain within safe limits.

Practical Recommendations

Use modular containment systems with sliding or hinged doors to fit the 800mm aisle while maintaining airflow separation. Ensure uniform rack heights along the aisle to prevent gaps that compromise containment. Consider overhead plenum or drop-ceiling solutions to guide hot air efficiently back to the CRAC unit.

Plan for service access: narrow aisles may require staggered maintenance schedules or retractable containment panels to allow personnel access without disrupting airflow.

Conclusion

While 800mm is narrower than typical hot aisle standards, it can be implemented effectively in a Tunisia data center with proper containment design, uniform rack alignment, and careful airflow management. This setup can still achieve significant cooling efficiency gains and energy savings if best practices are followed.