Zehnder Filter Set Suitable for Comfoair Original 350/550 1 x G4/F7 Filter + 10x Alternative Cone Filter DN 125 (ZEHNDER No. 400100084) : Amazon.de: Home & Kitchen
Zehnder Filter set for ComfoAir 350/550, F7/G4 (1 of each) : Amazon.de: Home & Kitchen
Zehnder ComfoAir 350 / 550 - G4 + F7 original filter set
Zehnder ComfoAir 350 / 550 - G4 + F7 original filter set