General description vhbw offers a G4 / F7 air filter set in a 2-part pack designed for Viessmann ventilation devices. These replacement filters ensure your ventilation appliance operates efficiently and effectively. Technical specifications Filter class: G4 / F7 Material: polyester fleece Colour: white Weight: 222 g Dimensions - filter 1 (length x width x height): 37 x 19.7 x 2.3 cm Dimensions - filter 2 (length x width x height): 37 x 15 x 2.3 cm Air flow rate: up to 280 m³/h 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. The air direction is marked on the filter elements for proper installation.