Individually cooling one or more computers in a rack of computers in a data center including an air intake chamber, the air intake chamber having a first opening at a bottom end for receiving air from beneath the data center through perforated tiles in the floor of the data center and a plurality of openings at a top end for providing air into a plurality of flexible air channels; and a plurality of flexible air channels, each air channel having a first end opening into the air intake chamber and having an opening at a second end and having a connector to connect the second end of the flexible air chamber to a particular position in the rack corresponding to the location of a particular computer in the rack.