The book is derived from a symposium prompted by the growing concern for air quality in homes, offices and schools, and the need for better design of investigations about indoor air quality problems and solutions. Numerous chemical and physical factors influence the indoor concentrations of contaminants. The multiplicity of these factors makes the investigation design process complex. So, well-conceived designs and protocols form a crucial starting point for successful measurement programs. "Design" of a study relates to developing a general strategy or approach ; "protocols" refers to specific procedures to be followed in conducting a study. This document aims to provide information on designs and protocols used in different types of indoor air quality monitoring studies and to supply learning opportunities through shared experience

This guideline defines ventilation and then natural ventilation. It explores the design requirements for natural ventilation in the context of infection control, describing the basic principles of design, construction, operation and maintenance for an effective natural ventilation system to control infection in health-care settings.