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Indoor and Built Environment, Vol. 1, No. 6, 351-354 (1992)
DOI: 10.1177/1420326X9200100607

Performance of an Electrostatic Air Cleaner in Filtering Single and Mixed Aerosol Populations

Alistair C. Rickman

London School of Hygiene and Tropical Medicine, London, UK

The performance of a commercially available electrostatic air cleaner in filter ing aerosols of concern to health has been investigated, with efficiency trends related to gas flow rate. Using effective migration velocities, a predictive effi ciency equation was developed and tested for mixed aerosol population chal lenges. Although reliable for aerosols comprising particles smaller than approximately 5 µm diameter, the presence of large pollen grains (19 µm diameter) resulted in the loss of smaller particles from the collecting plates by a process of particle-knock re-entrainment.

Key Words: Filter • Precipitator • Aerosol • Pollen • Mould


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