We give you the guarantee

In order to be able to deliver convincing cleaning quality, we have had our cleaning process tested and certified by TÜV Rheinland.

In this series of tests, several new, cleaned and dirty filters were compared with each other. In the process, TüV Rheinland determined that our cleaning process restores the flow behavior of cleaned filters to comparable quality of new filters. This means that filters cleaned by us are equivalent to new filters.