General description vhbw offers a G4 / F7 filter set in a 2-part pack designed for Zehnder ventilation devices. This replacement filter set ensures your ventilation appliance is ready for use, effectively removing coarse dust, hair, insects, and pollen from the air. The combination of the coarse dust filter and pollen filter prevents external impurities from entering the ventilation system, enhancing air quality. Technical specifications Dimensions per filter (L x W x D): 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 The filters can be inserted quickly and without tools into the slide compartment of the ventilation unit. Usage To maintain optimal filter performance, it is recommended to change the filters regularly. 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