Effect of enhanced supply air filtration on indoor particle concentrations

Ilpo Kulmala, Aimo Taipale, Timo Jalonen, Minna Väkevä

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    The aim of this study was to examine the feasibility of a new efficient supply air filter system in reducing indoor submicrometer particle concentrations. The filter consists of an electrically enhanced particle filter combined with an adsorbent filter. A test filter was installed in the supply air of an office room in Helsinki city centre and its performance was evaluated by measuring pressure drop and particle filtration efficiency. The effect of improved filtration on indoor air quality was demonstrated by measuring indoor particle concentrations both in the test room and in a reference room. Results showed that the filtration efficiency for 0.3 µm size particles was high, 99.9 % despite of a fairly low pressure drop (40 Pa at airflow of 72 l/s). Use of enhanced supply air filtration may be an effective control method in situations where polluted ambient air degrades indoor air quality.
    Original languageEnglish
    Title of host publication8th REHVA World Congress - Experience the Future of Building Technologies, CLIMA 2005. Lausanne, Switzerland, 9 - 12 Oct. 2005
    Subtitle of host publicationCD-ROM proceedings
    PublisherREHVA Federation of European Heating, Ventilation and Air-Conditioning Associations
    Publication statusPublished - 2005
    MoE publication typeA4 Article in a conference publication
    Event8th REHVA World Congress: Experience the Future of Building Technologies - Lausanne, Switzerland
    Duration: 9 Oct 200512 Oct 2005
    Conference number: 8


    Conference8th REHVA World Congress
    Abbreviated titleClima 2005


    • filtration
    • indoor air quality
    • fine particles


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