Indoor Environmental Quality

Also known as: IEQ

The relative quality of the interior air environment, which typically consists of temperature, humidity, CO2 levels, and particulate matter such as dust, ozone, formaldehyde, volatile organic compounds (VOC), and other trace components. 

Indoor Environment Quality may also refer to biological contaminants, such as mold or Legionella bacteria, as well as the acoustic and visual quality of a place.