IMPROVING INDOOR AIR QUALITY IN SCHOOLS BY UTILIZING DISPLACEMENT VENTILATION SYSTEM

摘要

The study conducted by the Government Accounting Office in 1995 says that 25 % of the nation's schools are plagued by IAQ problems, even higher percentage of schools having IAQ problems is reported by the Environmental Protection Agency (Johnston and Davis 2001). Most of these IAQ problems can me contributed to poor ventilation. This paper will summarize the experience of 15 schools equipped with Displacement Ventilation (DV) system. It will illustrate how DV system improves the IAQ in schools and reduces system annual energy consumption by having higher supply temperature compared to traditional mixing ventilation system. Special attention will be contributed to the moisture control.