This Santa Fe Oasis Dehumidifier Outlet Duct Kit is used to duct the output (exhaust) vents of the Santa Fe Oasis105 Dehumidifier so it can dehumidify in multiple areas or an out-of-sight space. Attach the collars where air is exhausted out of the side of the unit. This kit includes a duct plate to add to the vent cover if needed. Part number 4042275.