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    bunsell's Avatar
    bunsell Posts: 1, Reputation: 1
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    #1

    Dec 9, 2011, 12:15 PM
    Furnace filters make noise?
    I installed an electrostatic filter in my cold air intake register in the ceiling. Now when the furnace kicks on or off there's a loud bang. Any suggestions?
    wbcci3371's Avatar
    wbcci3371 Posts: 2, Reputation: 1
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    #2

    Dec 9, 2011, 01:01 PM
    I also have an electronic air filter in my system's cold air return duct next to the inlet of the furnace. Occasionally there will be a crackle or snapping noise but that is all.
    Hearing a loud bang is not something you would hear from a (supplied 120 volt) electronic air cleaner. They use little current but are high voltage from a transformer and miscellaneous electronics within the unit.
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