These accessories are made for Dayton portable air conditioners to ensure compatibility and proper function.Portable air conditioner accessories are attachments, equipment, and replacement parts for adapting portable AC units to specific applications and keeping units in good repair. They're used for directing airflow to cool remote hot spots or specific workspaces, making connections to ductwork, filtering dust and airborne contaminants from intake air, and replacing worn or broken components. Top Exhaust Duct Adapter, 21-15/32 In L