General description vhbw offers a G4 / F7 filter set in a 2-part pack designed for your ventilation appliance. This replacement filter set ensures your ventilation device is ready for use again, effectively removing impurities from the air. Technical specifications Dimensions per filter (L x W x D): approximately 50 x 17 x 1 cm Filter class: F7 (red pollen filter) / G4 (black coarse dust filter) Type: pollen filter / coarse dust filter Material: synthetic fibre / plastic Colour: black / white / red Installation The 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 drawn into the unit. The pollen filter provides additional protection against fine dust and pollen. To maintain filter performance, the filters should be changed regularly. This filter set allows you to upgrade your ventilation unit to pollen filter class (F7) without installing