These new dust filters have extremely high particle removal efficiencies of 99,92 % (DDp+) and 99,98 % (PDp+). Evi Bultinck, Filter Media Specialist at Atlas Copco Airpower: "The filters are now fully certified according to ISO standards by notified bodies, both in-house as well as in external labs. This third party certification ensures our customers the air quality they require. On top of that, the new Atlas Copco filters bring a substantial energy saving."