The ACF503 Roof Fan Tray is a low cost solution that aids in heat removal from a Netshelter Enclosure. The system easily installs into the top of the enclosure and expels heat from the roof of the rack. Wall-mounted enclosures have the additional option of installing the rack fan tray systems in the base of the rack as well. The fan trays are designed to promote bottom to top airflow within the enclosure.