Technical data for recirculation mode Can be combined with wall chimney Significantly improved odor removal compared to conventional recirculation filter systems Noise reduction CleanAir activated carbon filter that can be regenerated multiple times Integrated design: Integrated CleanAir module is mounted invisibly inside the chimney. Installation is possible at different heights. Consists of CleanAir activated carbon filter that can be regenerated multiple times, filter holder, flexible hose, 2 hose clamps and fastening material