Patent ID: 7813120

Claim:
An enclosure for electronic modules, comprising: a chassis including a first end and a second end; a front region proximate the first end of the chassis and housing a first plurality of electronic modules, the front region including a first airflow inlet positioned at the first end of the chassis and a first airflow outlet; a rear region proximate the second end of the chassis and housing a second plurality of electronic modules, the rear region including a second airflow inlet and a second airflow outlet, the second airflow inlet positioned closer to the second end than the second airflow outlet such that airflow through the second plurality of electronic modules is transferred from the second end toward the first end; an airflow path having a third airflow inlet positioned at the first end of the chassis and fluidly coupled to the second airflow inlet of the rear region; and a plenum positioned between the front region and the rear region and fluidly coupled to receive airflow from the first airflow outlet of the front region and the second airflow outlet of the rear region and transfer airflow to a third airflow outlet such that airflow is transferred from the first end to the second end along the airflow path and back toward the first end from the second airflow inlet to the second airflow outlet.