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Describes tests conducted in an enclosed room fitted with a mock-up work station to determine the effects of air diffuser types and layouts on the ventilation condition of the workstation. Seven different layouts including two types of air diffusers were tested. For each air diffuser layout, tracer gas tests were conducted to measure air distribution patterns, air change efficiency and ventilation efficiency within the workstation, the surrounding area and in the return air duct. Additional tests were also conducted to investigate the effect of gap heights at the base of workstation partitions and of the supply air rate on the air distribution pattern within the workstation and its surrounding area. Presents the results in two papers - part 1 presents the results of air distribution patterns and the effects of gap heights at the base of workstation partitions and of airflow rates on these patterns, part 2 presents the results of air change efficiency and ventilation efficiency.

KEYWORDS: Diffusers, offices, testing, tracers, layout, local ventilation, ventilation, air distribution, air change rate, efficiency, return air, ducts, internal walls, supply air.

Citation: ASHRAE Trans., 1993, vol.99, part 2, Paper numbers 3703 and 3704, 125-132, 12 figs, 1 tab, refs, 133-143, 8 figs, 3 tabs, refs.