General description vhbw offers a clever solution with this G4 / F7 filter set, designed specifically for Zehnder ventilation devices. This 2-part kit ensures your ventilation appliance is ready for use, effectively removing coarse dust, hair, insects, and pollen 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 Installation Filters can be inserted quickly and without tools into the slide compartment of the ventilation unit. Usage Regularly change the filters to maintain optimal performance of your ventilation device. This filter set allows for an upgrade to pollen filter class (F7) without the need for external pollen filter housing. Other information The air direction is marked on the filter elements. Content of delivery: 2x filter (G4 / F7)