超细和亚微米颗粒可能与呼吸和心肺疾病及综合征高度相关。许多研究表明，在通风空气过滤器上游运行的电离器可以提高过滤器的颗粒收集效率，而不会影响压降。然而，这些研究大多基于一种单纤维材料，没有对不同的通风过滤器进行任何比较。本研究调查了纤维材料和过滤器等级对提高效率的影响。还考虑了离子浓度的影响。实验是在一个完整的环境中进行的- 称重过滤器试验台和一个100%空气再循环的腔室。在过滤器试验台上测试了由三种纤维材料制成的七个F5-F9级（MERV11-15）通风过滤器。使用扫描迁移率粒度仪（SMPS）对上游和下游气流中的超细和亚微米颗粒进行计数。在室内试验中，在空气再循环系统中安装了G4级（MERV 8）带电合成过滤器。使用P-TRAK超细粒子计数器、CI-500光学粒子计数器和尘埃TRAK气溶胶监测器测量超细和亚微米粒子。 结果表明，在给定的实验条件下，电离能显著提高过滤效率。例如，在电离器的辅助下，粗G4（MERV 8）过滤器的过滤效率提高了约30%到40%——亚微米颗粒的过滤效率。在离子浓度相同的情况下，荷电合成滤光片的增强效率高于玻璃纤维滤光片，尤其是在超细颗粒含量方面。同样，在离子浓度相同的情况下，较高级别的荷电合成过滤器比较低级别的荷电合成过滤器表现出更高的增强效率。 试验台和试验箱中的臭氧生成量都可以忽略不计。引文:伊利诺伊州芝加哥ASHRAE会议论文

Ultrafine and submicron particles are possibly highly related with respiratory and cardiopulmonary diseases and syndromes. Many studies show that an ionizer operated upstream of a ventilation air filter could enhance the particle collection efficiency of the filter, without affecting the pressure drop. However, most of these studies are based on one single fiber material and does not develop any comparison among different ventilation filters.This study investigates the influence of the fiber material and filter class on the enhanced efficiency. The influence of ion concentration is also considered. The experiments were conducted in a full-scale filter test rig and a chamber with 100% air re-circulation. Seven ventilation filters of class F5-F9 (MERV11-15), made of three types of fiber materials were tested in the filter test rig. A Scanning Mobility Particle Sizer (SMPS) was utilized to count ultrafine and submicron particles in the upstream and downstream air flow. In the chamber test, a charged synthetic filter of class G4 (MERV 8) was mounted in the air re-circulation system. A P-TRAK Ultrafine Particle Counter, a CI-500 optical particle counter and a Dust-TRAK Aerosol Monitor were used to measure ultrafine and submicron particles. The results show, under the given experimental conditions, that ionization could substantially improve the filtration efficiency. For example, assisted by the ionizer, the coarse G4 (MERV 8) filter showed a filtration efficiency that increased by about 30 to 40 %-units for submicron particles. For the same ion concentration, the enhanced efficiency of charged synthetic filters is higher than that of glass fiber filters, especially in the ultrafine particle size fraction. Similarly, with the same ion concentration, the charged synthetic filters of higher class showed higher enhanced efficiencies than the charged synthetic filters of lower class.Measurements showed a negligible generation of ozone, both in the filter test rig and in the test chamber experiments.