General description vhbw offers a G4 / F7 filter set in an 8-part pack designed for Zehnder ComfoAir Q450 TR and Q450 TR Enthalpie ventilation devices. This replacement filter kit ensures your ventilation appliance is ready for use, effectively removing impurities from the air. Technical specifications Dimensions per filter (L x W x D): 50 x 16 x 2 cm Filter class: G4 / F7 Type: coarse dust filter (G4) / pollen filter (F7) Folding: Z-Line Material: synthetic fibre Colour: white Weight: 319 g Compatibility and accessories Compatible with: Zehnder ComfoAir Q450 TR, Q450 TR Enthalpie Replacement for: 400502013 Installation Filters can be inserted quickly and without tools into the slide compartment of the ventilation unit. Usage The coarse dust filter (G4) removes hair, insects, sand, and other coarse dust from the air. The pollen filter (F7) provides additional protection against fine dust and pollen. Regularly change the filters to maintain optimal performance. This filter set allows