Spengler, J.D. and Chen, Q. 2000. “Indoor air quality factors in designing a healthy building,” Annual Review of Energy and the Environment, 25, 567-600. Indoor Air Quality Factors in Designing a Healthy Building John D. Spengler School of Public Health, Harvard University, 665 Huntington Avenue, Boston, Massachusetts 02115; e-mail:
[email protected] Qingyan (Yan) Chen Building Technology Program, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139; e-mail:
[email protected] KEY WORDS: regulations, contaminant sources, building materials and systems, ventilation models, design tools Shortened title: IAQ in Designing a Healthy Building Abstract Current guidelines for green buildings are cursory and inadequate for specifying materials and designing ventilation systems to ensure a healthful indoor environment, i.e. a “healthy building,” by design. Public perception, cultural preferences, litigation trends, current codes and regulations, rapid introduction of new building materials and commercial products, as well as the prevailing design-build practices, pose challenges to systems integration in the design, construction and operation phases of modern buildings. We are on the verge of a paradigm shift in ventilation design thinking. In the past, thermal properties of air within a zone determined heating, ventilating, and air- conditioning (HVAC) specifications. In the future, occupant-specific and highly responsive systems will become the norm. Natural ventilation, displacement ventilation, microzoning with subfloor plenums, along with the use of point of source heat control and point of use sensors, will evolve to create a "smart" responsive ventilation-building dynamic system. Advanced ventilation design tools such as the modeling of computational fluid dynamics (CFD) will be used routinely.