Yes, and it is one of this city's signature findings. A humidifier set to a fixed comfort level does not know the outdoor temperature fell to ten degrees, so it keeps loading the house until moisture condenses on the coldest surfaces, window frames, north wall corners, and inside the duct system at the coil. The growth that follows is real mold with an appliance for an author. The correction is a setting discipline, indoor humidity stepped down as temperatures fall, plus a coil and pan inspection, and it is one of the few mold scopes in this city whose source can be fixed with a dial and a sentence of instruction.
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