Accessory set for partially ducted recirculation of your cooktop with an integrated ventilation module. It is to be used in combination with the flat duct elbow already included in the appliance set. The set consists of: 3 female connection sleeves for combining male flat duct elements, one straight flat duct piece (male, 500 mm), one 90° vertical flat duct elbow (L radius, male), and a diffuser element (male) that can be connected to the flat duct elements to distribute the outgoing air in the base area for partially ducted recirculation configurations. The elements allow installations in countertop heights of up to 960 mm. The accessory set meets the needle flame test (according to IEC 60695-11-5) and the building material class B1 (according to DIN 4102-1).