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������ϲʿ��� 16890-1:2016 establishes an efficiency classification system of air filters for general ventilation based upon particulate matter (PM). It also provides an overview of the test procedures, and specifies general requirements for assessing and marking the filters, as well as for documenting the test results. It is intended for use in conjunction with ������ϲʿ��� 16890‑2, ������ϲʿ��� 16890‑3 and ������ϲʿ��� 16890‑4.

The test method described in this part of ������ϲʿ��� 16890 is applicable for air flow rates between 0,25 m3/s (900 m3/h, 530 ft3/min) and 1,5 m3/s (5 400 m3/h, 3 178 ft3/min), referring to a test rig with a nominal face area of 610 mm × 610 mm (24 inch × 24 inch).

������ϲʿ��� 16890 (all parts) refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99 % when tested according to the procedures defined within ������ϲʿ��� 16890‑1, ������ϲʿ��� 16890‑2, ������ϲʿ��� 16890‑3 and ������ϲʿ��� 16890‑4. Air filter elements with a higher initial efficiency are evaluated by other applicable test methods (see ������ϲʿ��� 29463-1, ������ϲʿ��� 29463-2, ������ϲʿ��� 29463-3, ������ϲʿ��� 29463-4 and ������ϲʿ��� 29463-5).

Filter elements used in portable room-air cleaners are excluded from the scope of this part of ������ϲʿ��� 16890.

The performance results obtained in accordance with ������ϲʿ��� 16890 (all parts) cannot by themselves be quantitatively applied to predict performance in service with regard to efficiency and lifetime. Other factors influencing performance to be taken into account are described in Annex A.