Zainal M, Croome D J
Bibliographic info:
11th AIVC Conference "Ventilation system performance" Belgirate, Italy, 18-21 September 1990

The paper presents results of ventilation characteristics of a lecture/seminar room obtained by various door-window opening combinations and positions, and the level of comfort and air quality resulted by the given window-ventilating modes. Applying statistical methods, formulae of air change rate for the test room under it's normal operating condition i.e. when all window and external door are shut and when particular windows are opened is also presented and graphs in relation to dominancy factors such as wind and buoyancy effects, are given. It is found that, under it's normal operating mode the natural supply of outdoor air is far too deficient for health and comfort purposes. Means of improving the thermal environment and indoor quality to meet the fresh air requirements as recommended by both the ASHRAE and CIBSE Guides are suggested by proper selection of window opening patterns. Assessements of thermal comfort using a thermal comfort meter and occupancy odour or freshness were also conducted.