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The hot aisle width in the computer room should be greater than 800mm

The hot aisle width in a computer room should ideally be at least 1. 2 meters (1200mm), which is significantly greater than 800mm to ensure proper airflow, safety, and serviceability.

Recommended Width

While a width of 800mm may allow minimal access, industry guidelines recommend a hot aisle width of around 1. 2 meters (4 feet) or more to facilitate unobstructed airflow and safe personnel movement. This width allows for adequate space between the backs of server racks, ensuring that hot exhaust air can be efficiently removed and does not recirculate into the cold aisle.

Wider aisles also accommodate maintenance activities, cable management, and access to overhead systems such as lighting, fire detection, and suppression equipment.

Importance of Proper Hot Aisle Width

Airflow Efficiency: Adequate spacing prevents hot air from mixing with cold air, improving cooling efficiency and reducing energy consumption. Safety and Accessibility: Wider aisles allow personnel to safely navigate the room, perform maintenance, and evacuate in emergencies. Containment Compatibility: Hot aisle containment systems, which include doors and overhead panels, require sufficient aisle width to function effectively and direct hot air back to cooling units.

Practical Considerations

Raised Floors and Ceiling Height: For rooms with raised floors or ceiling heights exceeding 3. 7 meters, additional aisle width may be necessary to accommodate lifts and overhead infrastructure. Rack Configuration: Uniform rack heights and proper cable management are essential to maintain airflow and prevent obstructions in the hot aisle.

Containment Systems: Hot aisle containment is often preferred for thermal efficiency and easier implementation, but the aisle width must support the containment structure. In summary, while 800mm may be a minimal clearance, a hot aisle width of at least 1. 2 meters is recommended to optimize cooling performance, operational safety, and maintenance access in computer rooms and data centers.

The hot aisle width in the computer room should be greater than 800mm

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