By using regenerable antistatic H13 or H14 filter elements (DIN EN 1822-1), the residual dust values ​​of the previous two-stage suspended matter filtration can be achieved with only one filter stage with the standard designs. Expensive process interruptions when replacing the secondary filter are a thing of the past. In particularly sensitive areas such as chemical or pharmaceuticals, e.g. our mini filters "breathing filters" or "filter modules" can be used as plug-in or top-mounted filters. Depending on the application, they serve as the first or second filter stage.