With the advent of blade and other high-density servers, heat densities have climbed to challenging levels. In many instances, the amount of heat generated per rack exceeds that which can be effectively handled by traditional air-cooled solutions. The APC High-density Cooling Enclosure with patent-pending horizontal airflow design is a self-contained, closed loop system that utilizes chilled water to cool up to 18kW per rack. This innovative concept is a quickly deployable, space-saving, scalable, and energy efficient alternative to cooling high-density IT loads.