A computer chassis cooling sidecar for cooling one or more computers in a chassis of computers in a data center, the sidecar including an air intake chamber and a chassis delivery 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 located on the side of the computer chassis, the air intake chamber having at the top end a directional vane shaped to direct airflow from the side of the chassis to a chassis delivery chamber; wherein the chassis delivery chamber resides in front or back of the chassis and has an opening to receive air from the air intake chamber and an opening to deliver the received air to the front or back of the computer chassis.