With the external corner

article 317014 is additionally required

5 x 25 mm 17 x 9813 Polyklammer 11 x 20 mm 5 x 9817 Anfangsgleiter 1 x 9821 Stopper 1 x 9818 Gleiter 5 x 9820 Winkelgleiter 2 x 9819 Führungsstück 5 x 9816 Senkkopfschraube 3

Stainless steel self-acting closing flap

Marley Air 4.0 Frischluft-wärmetauscher With the external cornerThe Marley Air 4. 0 a decentralized ventilation unit made in Germany with heat recovery of up to 80%. It impresses with particularly low operating noise and high performance with low consumption (energy efficiency class A). Tool free maintenance makes the Air 4. 0 the perfect solution for do it yourself installation. Fresh and healthy indoor air at all times and protection against mold growth: Decentralized systems for controlled domestic ventilation