General description vhbw offers a G4 / F7 filter set in a 4-part pack designed for Zehnder ventilation devices. This replacement filter kit ensures your ventilation appliance operates efficiently by effectively removing impurities from the air. 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 Weight: 511 g Replacement cycle: every 6 months 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 drawn into the unit. The pollen filter provides additional protection against fine dust and pollen. The combination of these filters prevents external impurities from entering the ventilation system. Regularly changing the filters is essential to maintain the filter performance of your fan.