Flush-mounted housing with fire protection coating K 90, metal exhaust nozzle with automatic non-return valve and shut-off when fusible link is triggered*. Exhaust nozzle on the back, can be rotated by 90° as required. For the shortest connection to the main line. Removable plug connection for electrical connection. Reusable hinged plaster cover. Connection DN 80 mm. Area of application For ventilation of kitchen, bathroom or toilet. Flush-mounted installation in wall, ceiling and K 90 qualified ventilation shafts. Connection of 1 or 2 devices per floor up to 20 full floors possible. *The non-return valve in fire protection housings also basically meets the requirements of a cold smoke shut-off valve. For apartment kitchens, use of a fan with 100 m³/h is recommended.