- Filter mat 1.0 x 2.0 m - Colour white - for cutting to size - Shatterproof, synthetic fibres, self-extinguishing - Progressively structured filter medium; GLASS-FIBRE-FREE - Class G3 (EU3) in accordance with EN779:2012, thickness approx. 10 mm, ISO Coarse 45% - Class G4 (EU4) according toEN779:2012; thickness approx. 20 mm, ISO Coarse 55% - Class F5 (M5) in accordance withEN779:2012; thickness approx. 20 mm, ePM10 70% The filter mat in accordance with EN779 and ISO Coarse has been specially developed for use in controlled domestic ventilation systems. It is used to remove dust, pollen and other particles from the air drawn in before it enters the living space. This improves the air quality and reduces the risk of allergies and respiratory illnesses. The filter mat is made of synthetic fibres and is available in various sizes and material thicknesses. The filter mat is easy to install and replace and can be easily retrofitted into existing ventilation systems.