Long term performance of particulate air-filter in an office environment

Alireza Afshari, Ahsan Iqbal, Niels Christian Bergsøe

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review


The present article is based on initial findings of an ongoing study. The objective of present study is to analyse the long term performance of an air particulate filter with and without ionizer. To study the performance of the air filters, a test rig was built in the Danish Building Research Institute - Copenhagen. Two parameters, pressure drop across the filter and ultrafine filtration efficiency of the filter are analysed for describing the performance of the filter. In the preliminary findings it was found that the ultrafine particle filtration efficiently of the air filter was 60%. The efficiency decreased with time. The pressure drop across the filter did not decrease significantly. When the same type of filter was used in with air ionizer, the efficiency at the beginning was 90% but it reduced to 60% after 1500 running hours. Hence it is concluded that the filtration efficiency does not increase much by the introduction of the ionizer on long term basis.
Original languageEnglish
Title of host publicationProceedings of Healthy Buildings 2015 Europe
EditorsMarcel Loomans, Marije te Kulve
Place of PublicationEindhoven
PublisherInternational Society of Indoor Air Quality and Climate
Publication date2015
Article numberPaper ID547
ISBN (Electronic)978-90-386-3889-8
Publication statusPublished - 2015
EventHealthy Buildings Europe 2015, HB 2015: Europe 2015 - TU/e, Eindhoven, Netherlands
Duration: 18 May 201520 May 2015


ConferenceHealthy Buildings Europe 2015, HB 2015
SponsorAlfred P. Sloan Foundation, Ecophon Saint-Gobain, et al., Interface, TNO, Velux, Velux

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