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: Home & Kitchen
Centralized ventilation unit - WS 170 AIR@HOME SERIES - MAICO Ventilatoren - heat-recovery / residential / commercial