Rack Air Removal Unit SX Application Guidelines

This application note provides guidelines for applying the Rack Air Removal Unit SX (ARU SX), a rack-mounted fan system for NetShelter SX and VX enclosures that draws exhaust air from IT equipment and discharges it upward into a ducting kit. It covers rack compatibility, ducting kit requirements, ceiling plenum considerations, and the importance of ducting to prevent hot air recirculation, with modeling showing that unducted units can cause hot air to circulate downward into equipment inlets.