"This is the most comprehensive book on the market about indoor allergens. The authors discuss the potential dangers to health caused by all matter of indoor allergens. This book is informed by the first author's education in chemistry and his thirty-plus years of running a business that identifies and fixes indoor air pollution. This second edition is greatly expanded, with eight new chapters and updated content in the other chapters. New chapters cover environmental hazards, testing and remediation, heating and cooling without ducts, and indoor air issues in a multi-unit building"-- Provided by publisher.