- The Hepa filter keeps 99.5% of all particles over 0.0003 mm size away from the outlet air (e.g. house dust and microscopically small pests such as pollen and fine dust particles) ,- Cartridge with hypo-allergenic filter of Hepa H 12 filter class ,- To maintain effective filtration, the Hepa filter must be replaced at least once a year , ,- Suitable for Miele devices with the designation: S2, S300-800, S7 and Complete C1, Classic C1, Dynamic U1 ,- Manufacturer designation: SF-AH 30, SF-HA 30, Nr. 9.616.270 - Degree of Filtration: HEPA 12 ,- Width x Height: 9.5 x 19 cm 2 years legal warranty only