Function & Performance: Even greater safety provided by a filtration efficiency of 99,995 %. Advantages: Tool less and quick change of the filter. Available for Silent TS, TS2 and Vortex compact 3L. Each filter is delivered with an individual certificate (tested according to DIN EN/IEC 60335-2-69 A.3/AA.22.201.2 and EN 1822-5 Hepa Filters / MIL-STD 282 Type: C).