Presents results from a research project to investigate the effects of a floor-supply displacement ventilation system with practical indoor heat loads. The experiments were performed in an experimental chamber (35.2m²) located in a controlled environment chamber. Temperature distributions were measured at seven heights throughout the experimental chamber for each test condition. Data were analysed to observe thermal stratification as affected by lighting, occupants, and heat loads (personal computers), and its disruption caused by walking and change of air volume. In addition, air flow characteristics and ventilation efficiencies were investigated using a smoke machine, tobacco smoke, dust for industrial testing, and a tracer gas (CO₂) step-up procedure.

KEYWORDS: year 1995, experiment, elevated, floors, displacement ventilation, climate chamber, temperature distribution, temperature stratification, air flow, performance, efficiency, ventilation, tobacco smoke, dust, carbon dioxide, measuring, cooling, thermal comfort, air quality, indoor