General description High-quality filter set for your ventilation system designed to improve indoor air quality and ensure a pleasant and healthy environment. This filter set guarantees efficient removal of pollutants and impurities from the indoor air, including dust, fine dust, pollen, allergens, and pathogens such as bacteria and mould spores. It also effectively removes cigarette smoke, exhaust fumes, chemical vapours, and unwanted odours from household air. Technical specifications Exhaust filter: 4x Filter classification: G4 Dimensions: 26 x 17.8 x 2.3 cm Colour: white Intake filter: 4x Filter classification: F7 Dimensions: 26.1 x 16.2 x 4.3 cm Colour: white Other information Replacement for Viessmann ZK01767 It is recommended to change the filter regularly depending on usage frequency.