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Retrospective - Black Stains in Houses: Soot, Dust, or Ghosts

May/June 2014
This article originally appeared in the May/June 2014 issue of Home Energy Magazine.
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May 01, 2014
An experienced ghost hunter explains the possible sources of and solutions to black soot under doors, on walls, and in other places in homes.
By now, we’ve all heard about “black soot” or “ghosting”—one of the hottest topics in the building industry today. The dark marks have been seen on interior and exterior wall surfaces; on carpet surfaces at wall-to-floor connections or door undercuts; on ceilings; on furniture, heating and air conditioning filters, blinds, drapes, doors, countertops, television screens, and computer monitors; and on the top side and leading edges of ceiling fans.

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