General description vhbw offers a clever solution with this G4 / F7 filter set designed for Zehnder ComfoAir 350 ventilation devices. This 2-part 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): approximately 50 x 16 x 1 cm Filter class: G4 / F7 Type: pollen filter / coarse dust filter Material: synthetic fibre / plastic Colour: white / green / yellow Compatibility and accessories Compatible with Zehnder ComfoAir 350 Replacement for Zehnder part numbers: 006040200, 006040202, 006040220, 400100085 Installation Filters can be inserted quickly and without tools into the slide compartment of the ventilation unit. Usage The coarse dust filter removes hair, insects, sand, and other coarse dust from the air. The pollen filter provides additional protection against fine dust and pollen. Regularly change the filters to maintain optimal performance. This filter set allows upgrading