Original WSF 320/470 replacement air filter item no. 0092.0559 from Maico fans, packaging unit 1 x F7, for central ventilation units WR 310, WR 410, WS320 and WS 470 : Amazon.de: DIY & Tools
MAICO WS 320 / WS 470 Filters – CleanFilter
Ersatzluftfilter MAICO WS 320/470 | Lüftungstechnik-Shop radotronic Produktions- und Service GmbH