We present Avatar, a data center environmental advisory system for raised floor data centers. Using limited information such as inlet and reference temperatures for IT equipment and basic floor plan geometry, Avatar produces recommendation to adjust the operation of computer room air conditioners (CRACs) and the configuration of vent tiles in a data center so as to reducing excess provisioning of cooling and to remove hot spots. Avatar reduces operating expenses by cooling the same load with less energy. Avatar reduces capital expenses by recovering stranded cooling capacity that would otherwise have to be replaced.

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