People spend most of their time indoors, and indoor air pollutants can cause both long and short term health effects. Awareness of indoor air pollution as an environmental issue, however, is relatively new. This book has been prepared to offer an up-to-date, comprehensive reference manual on indoor air quality to scientists and professionals active in this area. The intention of the book is to bring together a collection of contributions from specialists in the specific disciplines of indoor air quality, covering all points of view from various angles, from building design and building sciences, to health effects and medical diagnosis, toxicology of indoor air pollutants, and air sampling and analysis. One of the characteristics of this book is the multidisciplinary approach that integrates the expertise of medical doctors, architects, engineers, chemists, biologists, physicists and toxicologists. The resulting product is of great educational value and recommended for consultation as well as teaching purposes. The panel of conrtibuting authors includes top experts on indoor air worldwide, who have participated in international workshops and led the development of indoor air sciences over the recent years.