The best way to prevent this problem — known as recirculation air — is to make certain sufficient supply air is provided into the cold aisle. Traditional open aisle data centers use perimeter PAC (precision air conditioning) or CRAC (computer room air conditioning) units to channel cold air up through a raised floor void via grilles positioned in front of the IT cabinets. Why Are Hot & Cold Aisles in Data Centers Important? One of the primary reasons for implementing hot and cold aisles is energy efficiency. By segregating the hot and cold air streams, data. Cold aisle containment is one solution to prevent the cold supply air and hot return air from mixing and increasing airflow issues in your aisles. New data centre builds, on the other hand, tend to take. While advanced cooling systems like chilled water plants and CRAH units play a major role, one of the most effective strategies is much simpler: controlling how air moves through the data hall. When implemented. Maintain inlet temperatures between 64. 6 °F and ensure fire-suppressant systems, such as FM-200, have unobstructed paths. Finally, plan power and data pathways. Decide if cables will run overhead on ladder racks or under the floor in trays before racks are placed.