- The Hepa filter keeps 99.5% of all particles which are larger than 0.0003 mm (e.g. house dust, microscopically small pests, pollen, fine dust particles) away from the outlet air ,- Cartridge with one hypo-allergenic filter: filter class Hepa H 12 ,- To maintain effective filtration, the Hepa filter must be replaced at least once a year , ,- Suitable for Miele devices with the designation: S4, S5, S6, S8 and Compact C1-C2, Complete C2-C3 ,- Manufacturer designation: SF-AH 50, SF-HA 50, Nr. 9.616.280 - Degree of Filtration: HEPA 12 ,- Width x Height: 9 x 19.5 cm 2 years legal warranty only