The term “sick building syndrome” (SBS) is a term used to describe situations in which building occupants experience acute health and comfort effects that appear to be linked to time spent in a building, but no specific illness or cause can be identified.

Many different indoor air quality symptoms (IAQ) have been associated with SBS, including respiratory complaints, fatigue and irritation. These complaints may be localized in a particular room or zone, or may be widespread throughout the building.

Most of the complainants report relief soon after leaving the building, and may require prolonged recovery times after leaving the building.