The 9/J 30 is a wall duct without plaster frame. This wall duct is needed for the Silvento ec if it is to be used as an external wall ventilator for external bathrooms and WCs.
For the Silvento with 3/AP and 3/UP-AS casing.
Dimensions (Ø x L): 98 x 300 mm
Art.-no. 39 845