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However, industry data indicates that up to 60% of available data center cooling capacity is wasted by airflow that bypasses the equipment it is intended to cool. Sources of "bypass air" include incorrect positioning of perforated tiles, poor placement of air conditioning units, and poorly sealed (or unsealed) cutout spaces in floor panels beneath racks and cabinets for underfloor cable routing. Whatever the source, this “bypass air” weakens the efficiency of the raised floor cooling system and has the potential to increase network downtime.