RT Book, Section A1 Puri, Rajan A1 Wittman, Richard A2 LaDou, Joseph A2 Harrison, Robert J. SR Print(0) ID 1180883263 T1 Building-Related Illness T2 CURRENT Diagnosis & Treatment: Occupational & Environmental Medicine, 6e YR 2021 FD 2021 PB McGraw Hill PP New York, NY SN 9781260143430 LK accessmedicine.mhmedical.com/content.aspx?aid=1180883263 RD 2024/04/16 AB Indoor air quality (IAQ) can cause or contribute to a variety of symptoms, or even illness, in building occupants, negatively impacting their health and productivity. Americans, on average, spend 90% of their time indoors, where air quality is dependent on local ventilation and conditions. Climate change, extremes of heat and cold, and changes in seasonal conditions impact IAQ, both directly due to changes in moisture and dust content in the air, as well as indirectly due to increased reliance on recycled/conditioned air. In such scenarios, concentrations of some endogenous pollutants inside buildings may exceed standards established for outdoor concentrations.