General description vhbw offers a G4 / F7 filter set designed for Wernig ComfortVent G90-180 ventilation devices. This 2-part kit includes a coarse dust filter (G4) and a pollen filter (F7), ensuring your ventilation appliance operates efficiently by removing various airborne particles. Technical specifications Dimensions per filter (L x W x D): 24 x 12 x 5 cm Filter class: G4 / F7 Type: pollen filter / coarse dust filter Folding: Z-Line Material: synthetic fibre Colour: white Weight: 84 g Compatibility and accessories Compatible with Wernig ComfortVent G90-180 Replacement for 400100091 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 filter performance. The coarse dust filter (G4) removes hair, insects, sand, and other coarse dust. The pollen filter (F7) provides additional protection against fine dust and pollen. Other information The air direction is marked on