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Cold Aisle Containment

Cold Aisle Containment consists of a physical barrier that allows the supply air to pool inside the aisle.

Cold aisle containment (CAC) typically consists of aisle end doors and a roof system to contain the supply airflow to the intake of the IT equipment. Most CAC roofs are no higher than the top of the rack. In most cases, this avoids running into obstructions such as cable trays. CAC ensures a uniform and predictable air temperature at the IT intake.

See our products featured as cold aisle containment in a tour of a data center in The New York Times video "Into the Cloud."


Energy Efficiency

The natural properties of cold air requires doors to prevent it from flowing out from the aisle ends. Cold aisle containment (CAC) ensures that the IT equipment is being cooled within the manufacturers' specifications. Hot spots, like a weak link in a chain, impacts the ability to achieve the efficient operating conditions recommended by the new ASHRAE TC 9.9 guidelines. CAC creates a uniform and predictable airflow that eliminates hot spots, ensuring optimal operating efficiencies.

Cabinet Space Efficiency

Data center space is expensive. Many companies do not populate the top 15% of the rack due to inconsistent supply air temperature. The area at the top of the rack is typically affected by hot exhaust air recirculation. Cold aisle containment systems are designed to eliminate these hot spots, allowing data centers to get more out their space. Under populating the rack increases the space cost per server ratio (Sp ~ SerR). While most ROI formulas compute the real cost of cooling saved, the increase in rack population alone saves companies millions of dollars towards new data center expansion. For CoLo sites, this would mean increased revenue per square foot.

Custom Cold Aisle Containment Systems

A variety of cold aisle containment configurations are shown below. These are actual customer projects, custom designed for their unique challenges.

For more detail about these projects, visit our projects page.