Poorly maintained humidifiers can become indoor air quality concerns because of:
A) Mold and mildew growth.
B) Unintended chemical reactions with HFC refrigerants.
C) Increased static discharge around all electrical connections.
D) Increased outgassing of volatile organic compounds.
A
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Fill in the blank(s) with the appropriate word(s).
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Indicate whether the statement is true or false.
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