Abstract: A unitary vent and duct assembly for installation within a framed section of a suspended ceiling structure comprises a cowling having a substantially closed top end and a substantially closed bottom end. The bottom end of the cowling is covered with a foraminous grill that allows passage of air into or out of the assembly. The assembly is sized to fit within a framed section of a suspended ceiling structure and has a plurality of spring biased barb bearing clips arrayed about its periphery. A semi-rigid flexible and lengthwise expandable duct is coupled to the top portion of the cowling and communicates with the interior thereof. In use, the vent and duct assembly is pressed into place within a framed section of a suspended ceiling structure, whereupon the peripheral clips engage and fasten to the struts of the ceiling structure to hold the assembly firmly but releasibly in place. The flexible duct can then be pulled away from the cowling and toward a main supply or return duct to which it is to be coupled.

Abstract: An air diffuser that injects triangular columns of air into a space to be air conditioned. The triangular columns of air entrain air into their wake and set up a cross flow of air in a direction normal to the path of travel of the air in the triangular columns. In a first embodiment, a plurality of elongate, triangular nozzles are disposed at an angle in penetrating relation to a ceiling so that a first end of each nozzle is above the plane of the ceiling and a second end of each nozzle is below the plane. A housing in fluid communication with a source of air to be introduced into the space is positioned above the ceiling in housing relation to the respective first ends of the nozzles so that air introduced into the housing under positive pressure is constrained to exit the housing through the nozzles. In second and third embodiments, the nozzles are of differing geometrical configurations in transverse section and do not penetrate the plane of the panel within which they are mounted.

Abstract: An air supplying apparatus for supplying a clean room with air having a conditioned cleanliness, temperature and/or humidity includes an air control unit for discharging the controlled air, and an air outlet duct connected to an air outlet of the air control unit so as to receive the conditioned air from the air control unit through an opening which opens in a direction different from the direction of flow of air through the air control unit. The air outlet duct is formed from one or more perforated sheets having a multiplicity of air outlet apertures. The cross-sectional area of the air passage formed in the air outlet duct preferably progressively decreases towards the downstream end of the duct. A joint duct, which guides air in a direction different from the directions of flow of air through the air control unit and through the air outlet duct, may be connected between the air control unit and the air outlet duct.

Abstract: A clean room diffuser panel for positioning below a ceiling grid mounted filter element. The diffuser panel is perforated throughout its area with increased size and density of perforations in a peripheral region to provide increased airflow beneath the ceiling grid. The peripheral regions are further angled or provided with directional vanes to create a lateral airflow beneath the ceiling grid.

Abstract: A duct to carry air has openings along it and a flexible sheet extending longitudinally within it. The end of the sheet adjacent the point of air intake can be brought against one side of the duct or the other, either to allow air to be blown through the duct along the side thereof in which the holes are located or to force the air to go through the duct along the other side, thereby not being able to emerge from those holes.

Abstract: A ventilation device comprises a hollow body having an air inlet end and an ir outlet end, swirl disk associated with the air outlet end and a perforated disk associated with the air inlet end.