Reliability of electret filters

Matti Lehtimäki, Kimmo Heinonen

    Research output: Contribution to journalArticleScientificpeer-review

    25 Citations (Scopus)

    Abstract

    The properties of electret filter materials have been investigated. The removal efficiency of electret filter materials used in ventilation filters and in room air cleaners has been measured for particle sizes ranging from 0.1 to 5 μm. The results indicate that the efficiency and reliability of an electret filter depend to a great extent on the stability of the electrostatic charge in the filter material. It has been found that the efficiency of electret filter material can decrease significantly when exposed to diesel fume aerosol or cigarette smoke aerosol. Arizona road dust aerosol, however, causes only a minor decrease in efficiency. The extensive use of electret filter materials in ventilation applications should be avoided until the stability and the reliability of the filtration has been verified by long-term field tests.
    Original languageEnglish
    Pages (from-to)353-355
    Number of pages3
    JournalBuilding and Environment
    Volume29
    Issue number3
    DOIs
    Publication statusPublished - 1994
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Electrets
    filter
    Aerosols
    efficiency
    Ventilation
    aerosol
    Air cleaners
    ventilation
    Fumes
    Smoke
    Dust
    Electrostatics
    Particle size
    air
    road
    smoke
    diesel
    cause
    particle size
    material

    Cite this

    Lehtimäki, Matti ; Heinonen, Kimmo. / Reliability of electret filters. In: Building and Environment. 1994 ; Vol. 29, No. 3. pp. 353-355.
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    Reliability of electret filters. / Lehtimäki, Matti; Heinonen, Kimmo.

    In: Building and Environment, Vol. 29, No. 3, 1994, p. 353-355.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Reliability of electret filters

    AU - Lehtimäki, Matti

    AU - Heinonen, Kimmo

    PY - 1994

    Y1 - 1994

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    AB - The properties of electret filter materials have been investigated. The removal efficiency of electret filter materials used in ventilation filters and in room air cleaners has been measured for particle sizes ranging from 0.1 to 5 μm. The results indicate that the efficiency and reliability of an electret filter depend to a great extent on the stability of the electrostatic charge in the filter material. It has been found that the efficiency of electret filter material can decrease significantly when exposed to diesel fume aerosol or cigarette smoke aerosol. Arizona road dust aerosol, however, causes only a minor decrease in efficiency. The extensive use of electret filter materials in ventilation applications should be avoided until the stability and the reliability of the filtration has been verified by long-term field tests.

    U2 - 10.1016/0360-1323(94)90033-7

    DO - 10.1016/0360-1323(94)90033-7

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