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).