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Describes experiments with wall-mounted air terminal devices. The stratified flow in the room is analysed, and the influence of stratification and the influence of room dimensions on the velocity level and on the length scale are proved. The velocity level in the occupied zone can be described by a single equation based partly on stratified flow theory and partly on measurements. A radial stratified flow is obtained if the room is ventilated by a single diffuser or if the diffusers are placed some distance from each other. A two-dimensional stratified flow is obtained if the room is ventilated by a number of diffusers placed close to each other on one sidewall. The velocity has a slight tendency to be constant in an area along the floor.

KEYWORDS: air flow, rooms, displacement ventilation, ventilation, wall mounted, air terminals, experiment, dimensions, speed, occupancy, measuring, diffusers, location, floors, turbulent flow, jets.