Plastic Frame 457x457x50mm (1,3m2). ISO coarse 70% according to ISO 16890.
Aluminum Frame 457x457x100mm (8m2). "Faceguard" of metal on inlet and outlet sides. Filter Class H14 according to EN 1822 (99.995%). For Your safety every filter comes with a Certificate and is leak tested. During present Corona Times we recommend to replace the HEPA H14 Filter 1-2 times a year.