Zehnder ComfoAir Q350/450/600 Filter Set, ISO Coarse / ISO ePM10 Activated Carbon (G4/M5), 2 pcs 400100031 so by ensuring this is

so by ensuring this is removed as soon as it is produced

Greeenwood Airvac's patented self-locating 'Twist-Lock' front fascia simply turns for easy removal

Make the best of all seasons – Climate Switch technology prevents overheating in summer and leverages heat recovery in winter for the best automatically adjusted indoor climate all year round

ComfoAir CCBL 3 position switch with service indicator

Zehnder ComfoAir Q350/450/600 Filter Set, ISO Coarse / ISO ePM10 Activated Carbon (G4/M5), 2 pcs 400100031 so by ensuring this isZehnder Filter for ComfoAir Q350 450 600, ISO Coarse >50% ISO ePM10 >50% activated carbon (G4 M5), 2 pieces