The HJS City-Filter® has been tested in Germany by TÜV and has the national type approval required under EU regulations. Furthermore, the City-Filter® fulfils the technical requirements laid down in the German Annex XXVI of StVZO §47 for a particulate reduction system, and it is also maintenance-free.
A large number of independent tests confirm that the City-Filter® sets the standard for all retrofit filter systems and achieves a filtration efficiency level of up to 70 per cent. The in Germany legally stipulated minimum of 30 per cent is more than complied with, whatever vehicle the filter is retrofitted to.
Last update on 2013-07-05 by Stefen Baetge.