The APC Rack 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. The fan tray promotes bottom to top airflow for an enclosure in zero U of space. Cools by exhausting heat out of the roof of the rackThis Roof Fan Tray is designed for 120 VAC devices.r to entire facilities. Its comprehensive solutions, which are designed for both home and corporate environments, improve the manageability, availability and performance of sensitive electronic, network, communication and industrial equipment of all sizes.This Roof Fan Tray is designed for 120 VAC devices.