A horizontal sliding window with a narrow vertical insert panel filling the track opening beside the sliding sash, featuring a circular 8-inch cutout through which flexible aluminum ducting passes to the outside. A cutaway section of the duct just behind the panel reveals a cylindrical spring-loaded backdraft damper with thin aluminum flap blades gripped inside the ducting by rubber gaskets, shown partially open to indicate airflow direction. Weatherstripping foam seals the top and bottom edges of the insert panel against the window frame and track. Clean technical cross-section illustration, labeled diagram style, soft even lighting, white background, isometric perspective, high detail, product-manual aesthetic. Ver más