Poorly maintained humidifiers can become indoor air quality concerns because of :

Poorly maintained humidifiers can become indoor air quality concerns because of
 
  A) mold and mildew growth
  B) increased static discharge around all electrical connections
  C) unintended chemical reactions with HFC refrigerants
  D) increased outgassing of volatile organic compounds

 Q. 2

Types of humidifiers used with commercial air handling equipment include
 
  A) bypass, atomizing, and wetted media B) steam grid, steam pan, and direct water spray
  C) direct expansion, chilled water, and steam D) direct expansion, steam, and hot water