Many people believe that measures which improve thermal efficiency or air-tightness in buildings increase indoor pollution levels. Not so, say the authors of Residential Indoor Air Quality & Energy Efficiency, who argue that sources of pollutants, rather than ventilation rates, are the major cause of indoor pollution. The authors present their case in three sections, first discussing the basics of air infiltration and natural vs. mechanical ventilation, next surveying the problems arising from a wide array of pollutants, and finally describing strategies for monitoring and controlling these pollutants. Early chapters give a breakdown of infiltration sources, explaining why natural ventilation isn't sufficient to control pollution and how pollutant concentrations relate directly to the rate of supply (but inversely to the rate of removal). The authors compare several types of ventilation