ISO 16890-2:2016规定了气溶胶生产，测试设备和用于测量通风空气过滤器的分数效率和气流阻力的测试方法。 它适用于ISO 16890-1，ISO 16890 3和ISO 16890 4。 ISO 16890本部分描述的试验方法适用于0,25 m3/s（900 m3/h，530 ft3/min）和1,5 m3/s（5 400 m3/h，3 178 ft3/min），指的是名义面积为610mm×610mm（24,0英寸×24.0英寸）的试验台。 ISO 16890（所有部分）是指根据ISO 16890（所有部分）中规定的程序进行测试时，通用通风的微粒空气过滤元件具有小于或等于99％的ePM1效率和超过20％的ePM10效率。 注意此测试程序的下限设置为最低ePM10效率为20％，因为低于此级别的测试过滤器元件将非常难以满足此程序的统计有效性要求。 通过其他适用的测试方法（见ISO 29463（所有部分））评估该气溶胶部分之外的空气过滤元件。 便携式空气净化器中使用的过滤元件不在范围之内。 性能结果符合ISO 16890标准

ISO 16890-2:2016 specifies the aerosol production, the test equipment and the test methods used for measuring fractional efficiency and air flow resistance of air filters for general ventilation. It is intended for use in conjunction with ISO 16890‑1, ISO 16890‑3 and ISO 16890‑4. The test method described in this part of ISO 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 (24,0 inch × 24,0 inch). ISO 16890 (all parts) refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99 % and an ePM10 efficiency greater than 20 % when tested as per the procedures defined within ISO 16890 (all parts). NOTE The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20 % since it will be very difficult for a test filter element below this level to meet the statistical validity requirements of this procedure. Air filter elements outside of this aerosol fraction are evaluated by other applicable test methods, (see ISO 29463 (all parts)). Filter elements used in portable room-air cleaners are excluded from the scope. The performance results obtained in accordance with ISO 16890 (all parts) cannot by themselves be quantitatively applied to predict performance in service with regard to efficiency and lifetime.