Abstract: A fresh air distribution system designed for PTAC use, the system comprising a first upwardly directed air distribution duct configured to receive a stream of pressurized fresh air discharged from a fresh air blower apparatus and to redirect the stream into a transversely extending second air distribution duct communicating with the first air distribution duct, the second air distribution duct comprising a plurality of laterally spaced baffles angularly disposed inside the duct that divide and redirect the stream into an inside plenum of the PTAC to be combined with recirculated in-room air.

Abstract: An air conditioning element of a woven or non-woven fabric includes a wall provided with at least a first array of through holes for distributing air, wherein the following relations apply to the through holes constituting the first array: the twofold value of the square root of the quotient between the value of the inlet area of a through hole and the value ? is less than or equal to the value of the wall thickness of the element in the region adjacent to the through hole and the center line of the through hole intersects the inlet plane of the through hole at an angle ?=60° through 89°, more preferably 80° through 88°, most preferably 83° through 87°.

Abstract: A drier for drying boards (32) comprises at least one conduit (34, 40) for directing airflow towards one of the faces of the board (32). The drier is configured such that at least a portion of the airflow travels across the face of the board (32) along the longitudinal axis of the drier, the longitudinal axis of the drier being the axis along which the board (32) travels as it is dried.

Abstract: A hub assembly for collapsible structures includes a first hub portion and a second hub portion. The first hub portion has a substantially U-shaped configuration and defines at least a first opening. The second hub portion has a substantially U-shaped configuration and defines at least a first pair of aligned openings. The first hub portion and the second hub portion are connected in a crossing-configuration, such that at least part of the second hub portion is received within the first pair of aligned openings of the first hub portion and at least part of the second hub portion is received within the first opening of the first hub portion.

Abstract: A one piece shower drain pan, encapsulated in a water proof membrane, and the method of fabricating the one piece open drain shower pan, the method which includes providing extruded polystyrene (XPS) foam of the type which absorbs very little water; shaping the section of extruded polystyrene foam with a CNC router to obtain the desired slope in the floor; cutting a hole in the foam to produce the drain hole; cutting a curb from the XPS foam and gluing the foam to a pan base on the open sides. Splash walls are then cut from concrete wall board and glued to the sides having no curb, so that the glue serves as a bonding agent and provides a waterproof seal between the parts; after the glue has cured, spraying the entire pan assembly with a polyurethane or polyurea coating to completely encapsulate the entire pan with a waterproof membrane, which provides strength and rigidity and defines a one piece drain pan ready for installation.

Abstract: An arrangement for ventilating a room contains a supply air duct arranged above an aisle region for delivering air into a room and, arranged above the supply air duct, an exhaust air duct for discharging exhaust air. The supply air duct contains two lateral air delivery portions which extend along the aisle region and each contain air outlet openings from which the supply air exits laterally. A substantially airtight central separating portion separates the first and the second air delivery portions from one another. The exhaust air duct contains two slot-like suction openings which extend substantially parallel to the supply air duct and are arranged in the ceiling such that there is formed on both sides of the aisle region a rolling air flow via which supply air heated in the region of work tables passes in a vertical direction into the region of the ceiling.

Abstract: The invention relates to a flat element (1) for thermally adjusting indoor air, especially for cooling indoor air. Said flat element (1) comprises an air guiding chamber (2) and an active cover surface (3) having microholes (4). The air guiding chamber (2) has an upper side (5), a plurality of sidewalls (6a, 6b), at least one opening (7) for letting air in and at least one opening (8) for discharging air. The active cover surface (3) closes the air guiding chamber (2) towards its open bottom side. The upper side (5) of the air guiding chamber (2) is shaped so as to have at least one baffle (10) having at least one air guiding edge (11).

Abstract: A device for supporting a suspended ceiling includes a section that is able to support the suspended ceiling and spacers disposed between the section and the walls of the building. A removable panel is mounted on a section, the panel being able to reduce a space provided between the wall and the section at least at the location of the section bearing the aforementioned panel. At least one of the spacers may simultaneously include means for fixing the spacer to the section and means for fixing the spacer directly to a wall or to a ceiling of the building, in such a way that the spacer may be secured to the wall or the ceiling and the section may not be secured to the wall or the ceiling without a spacer.

Abstract: The invention is an air flow diffuser that produces an even and non-turbulent flow of air from ventilation or A/C. The diffuser combines a pressure chamber and a discharge chamber to produce a non-turbulent even flow of air perpendicular to the face of the discharge chamber. The pressure and discharge chambers are contiguous with the ducted air flowing first into the pressure chamber and then into the discharge chamber from which chamber the non-turbulent, evenly flowing air flows into the space. Though the diffuser is developed for a downward air flow, the diffuser can be constructed in several shapes, such as triangular, allowing air flow in any direction that is perpendicular to the plane of the discharge plate.

Abstract: The invention relates to an air outlet (1, 1?), comprising a connecting piece (2) for the at least indirect connection to an air supply system, a housing (4) delimiting an air distribution chamber (7), and a perforated plate (5) forming an effective air discharge cross-section (10) of the air outlet (1, 1?), wherein a center line (9) of the connecting piece (2) is oriented perpendicular to the perforated plate (5). Starting from a center region of the housing (4), in which the connecting piece (2) empties into the air distribution chamber (7), walls (11) of the housing (4) that face the perforated plate (5) wrap around and extend in the direction of the perforated plate (5), inclined at an acute angle ? in relation to the perforated plate (5). The invention further relates to a suspended ceiling or a wall paneling, and to a method for producing a previously described air outlet (1, 1?).

Abstract: A ventilation/illumination duct is disclosed which can not only ventilate an indoor space, but also can illuminate the indoor space. A ventilation/illumination system using the ventilation/illumination duct, and a control method for the ventilation/illumination system are also disclosed. The ventilation/illumination system includes a ventilation device for blowing air, a light supplying device for supplying light, a ventilation/illumination duct for not only guiding the air blown by the ventilation device, to ventilate an indoor space, but also totally reflecting the light, to illuminate an indoor space, and a cleaner arranged in the ventilation/illumination duct.

Abstract: An air diffuser for distributing air into a room from a supply duct of an air distribution system having: a frame member, wherein the frame member includes an inner surface, and an outer surface; an attachment member, wherein the attachment member is associated with the frame member, and further wherein the attachment member is configured for associating the air diffuser with a supply duct; and a diffusing member, wherein the diffusing member comprises a substantially hemispherical dome having an inner surface, an outer surface, and a plurality of apertures, and wherein the substantially hemispherical dome emanates away from the outer surface of the frame member.

Abstract: A gas diffusion device used in conjunction with a flow of gas from a conduit utilizing a sheet having a peripheral edge defining a surface inwardly from the edge. The surface possesses a first zone, and a second zone between the first zone and the peripheral edge. A first plurality of apertures through the sheet lie in the first zone. A second plurality of apertures through the sheet lie in the second zone. The percentage of open area of the first plurality of apertures relative to the area of the first zone is less than the percentage of open area due to the second plurality of apertures through the second zone.

Abstract: A textile duct for an air circulation system, the duct having an inner gas-permeable layer and an outer gas-impervious layer, and one or more spaces therebetween. An air circulation system having one or more ducts and one or more air treatment units and/or air handling units. The ducts are formed from laminates suitable for forming a duct for an air circulation system, the laminate has an inner gas-permeable layer and an outer gas-impervious layer, and one or more spaces therebetween.

Abstract: The invention relates to a flat element (1) for thermally adjusting indoor air, especially for cooling indoor air. Said flat element (1) comprises an air guiding chamber (2) and an active cover surface (3) having microholes (4). The air guiding chamber (2) has an upper side (5), a plurality of sidewalls (6a, 6b), at least one opening (7) for letting air in and at least one opening (8) for discharging air. The active cover surface (3) closes the air guiding chamber (2) towards its open bottom side. The upper side (5) of the air guiding chamber (2) is shaped so as to have at least one baffle (10) having at least one air guiding edge (11).

Abstract: An air decontamination system including a sealed room to hold at least one person and the sealed room having an air inlet. The system further including a vacuum unit to create a negative pressure within the sealed room, by suctioning air through the air inlet into the sealed room and then from the sealed room into an inlet of the vacuum unit. The system still further including a work surface disposed in the sealed room at a predetermined height above a floor of the sealed room and the work surface to receive at least one mail piece and the air to be suctioned downwardly over the at least one mail piece and the work surface; and a filter unit to filter the air as the air is drawn out of the sealed room.

Abstract: A system and method for ventilating a room in which the system has at least one air supply unit and one air exhaust unit. The air inlet unit has a guiding slot diffuser for guiding an airstream in a certain direction, such that a patient, lying down in a bed on his back, receives the airstream frontally. The exhaust unit is arranged near the floor and near a head end of the bed such that air is arranged to leave the room after having ventilated the patient. The air supply unit is also provided with a booster fan arranged in air communication with the guiding slot diffuser such that fresh air can be forced through the diffuser by the aid of the booster fan forming a first an airstream. The first airstream leaves the diffuser bringing with it a larger mass of fresh air leaving the air supply unit via perforated sheets, forming the airstream devised to cool the patient.

Abstract: Air conditioning system including an outdoor unit, a compact indoor unit, air supply duct, air discharge duct, and preheat exchanger. An indoor heat exchanger in the indoor unit has a space therein in communication with a room, a fan in the indoor unit provided in the space draws air and discharges through the indoor heat exchanger. A ventilation guide duct in the indoor unit on an underside of the indoor heat exchanger has a partition wall for separating external air supplied from an outside of the room, and room air, for guiding the external air to the room through the fan, and the room air to the outside of the room. The air supply duct and the air discharge duct have one ends connected to the ventilation guide duct for guiding the external air to the room, and the room air to the outside of the room, respectively.

Abstract: A filter protection apparatus includes a frame of a closed curve defining an inner space isolated from surroundings, the frame having a shape of a filter securing part for securing an air filter, an attaching part for attaching the frame to a filter securing part, and a protection part, which is coupled on the inner surface of the frame to occupy the inner space with a plurality of minute holes through which air passes, for protecting the filter from damage. In operation, the protection part is able to prevent damage to the filter that may be caused by work instruments during maintenance work.

Abstract: A ceiling has an upper surface, a lower surface and a circular aperture. A boot has a cylindrical lower section and a large circular cross sectional configuration and with a cylindrical upper section and a small circular cross sectional configuration. The diameter of the circular aperture is slightly greater than the diameter of the lower section of the boot. The boot also includes a circular flange extending radially outwardly from the lower edge of the boot with threaded apertures around the flange. A grill has an exterior diameter equal to the exterior diameter of the flange. Threaded apertures are aligned with the apertures of the flange with bolts to removably couple the grill to the boot. The grill has a plurality of slots for the flow of air there through.

Abstract: A fabric air duct with main discharge openings includes additional, much smaller openings that help ventilate the surface of the duct. Ventilating the surface of the duct with a slight yet even amount of airflow helps inhibit the accumulation of condensate and dust on the surface of the duct. In some embodiments, the duct includes a pliable sheet consisting of a rather porous fabric base material. To achieve an appropriately low level of airflow, a plastic coating on the fabric reduces, but does not eliminate the fabric's porosity. A calendering process then reduces the porosity even further. In some embodiments, the calendering process occurs before the plastic coating process. In other embodiments, the pliable sheet is substantially air impermeable, except for its main discharge openings. The sheet is then perforated with numerous smaller openings to achieve the desired amount of surface ventilation.

Abstract: The present invention provides an air conditioning system including an outdoor unit, an indoor unit, and air supply and air discharge duct. The outdoor unit includes a compressor and an outdoor heat exchanger, and the indoor unit in a ceiling includes an indoor heat exchanger, a fan, guide means, and a preheat exchanger. The indoor heat exchanger has a space therein in communication with a room, and the fan is in the space for drawing air and discharging through the indoor heat exchanger. The guide means is provided on an underside of the indoor heat exchanger, for guiding the external air to the room through the fan, and the room air to an outside of the room. The preheat exchanger is arranged adjacent to, and in communication with the guide means, for indirect heat exchange of the external air and room air passing therethrough.

Abstract: A biological hazard mitigation apparatus permitting a material handling operation in the vicinity of a work area includes a plenum pneumatically coupled and proximate to one side of the work area, a filter sized to trap biological hazards and including an exhaust port, a blower including an inlet port and an exhaust port, and ducting pneumatically coupling the exhaust port of the filter to the inlet port of the blower, wherein the filter is disposed in the plenum, and adjacent surfaces of the filter and the plenum are substantially equal in surface area. If desired, the ducting includes first and second ducts, permitting a silencer to be disposed between the first and second ducts. Methods for operating the apparatus are also described.

Abstract: An air conditioning device using a false ceiling (2) and ensuring air diffusion along walls by providing intake of treated air into a volume created by the gap between the ceiling (1), the sealed false ceiling (2) and the walls (3), comprising spacers (4) between the wall and the section (6) fixing on edge the false ceiling, of slight width parallel to the wall and uniformly spaced, the spacers, fixed on the wall or on the section fixing on edge the false ceiling, providing a gap between the wall and the false ceiling, so as to enable air diffusion over the entire periphery of the premises. The device is provided with one or several beads (7) clipped between the section and the wall so as to close the gap in the zones where air diffusion should be blocked.

Abstract: Modern techniques for manufacturing paper using mechanical wood pulp has lead to a persistent over-acidification of printed manner, and threatens to permanently destroy the same. This over-acidification can be neutralized by using an alkaline active substance whose main component is a salt having a relatively low water affinity. An alkaline deposit can be deposited on the paper by also using said alkaline active substance. A device suited for deacidification using this active substance comprises a case (10) which can be closed. Printed matter which can be fanned out in a stand (1) is treated in said case. The printed matter is treated by introducing the powdered active substance via a screw conveyor (32) into an air stream circulated by a fan (19a), whereby the printed matter is leafed through in order to expose it to the active substance.

Abstract: In order to achieve a high cooling power while avoiding troublesome cold air flows, a chamber (2) is sealed, from the room to be cooled, by a thin cooling wall (1) of powder-coated steel with micro-holes which are arranged in a square 5 mm grid and have a diameter of 0.5 mm and whose free cross-section is consequently less than 1%. An antechamber (4) which is connected to the chamber (2) through a partition (3) by means of a distributor nozzle (17) and has air connections for connection to an air supply or an adjacent air-cooling element is arranged above the chamber (2). The cool air is introduced into the chamber (2) via the distributor nozzle (17) in such a way that it passes with high turbulence along the inside of the cooling wall (1). An air-cooling arrangement consists of rows, arranged side by side, of air-cooling elements whose antechambers (4) are connected by connecting nipples which each project into connecting orifices (10) of adjacent air-cooling elements.

Abstract: A fabric air duct with main discharge openings includes additional, much smaller openings that help ventilate the surface of the duct. Ventilating the surface of the duct with a slight yet even amount of airflow helps inhibit the accumulation of condensate and dust on the surface of the duct. In some embodiments, the duct includes a pliable sheet consisting of a rather porous fabric base material. To achieve an appropriately low level of airflow, a plastic coating on the fabric reduces, but does not eliminate the fabric's porosity. A calendering process then reduces the porosity even further. In other embodiments, the pliable sheet is substantially air impermeable, except for its main discharge openings. The sheet is then perforated with numerous smaller openings to achieve the desired amount of surface ventilation.

Abstract: An energy efficient air distribution system placed within the conditioned space of a building comprising a duct having an interior volume for conducting air. One of the exterior surfaces may have an ornamental design providing the impression the device is actually cornice molding. At least one recess is positioned along the exterior surface of the duct, such that it is obscured from view by a viewer standing within an occupancy zone of a room. An outlet is positioned within the recess for directing a flow of air from the duct interior volume through the exterior surface. The duct serves a function of conducting air throughout the room, and also has an aesthetically pleasing appearance. Junction boxes may be placed within the conditioned space for connecting the ducts. Junction boxes may further include an ornamental exterior for a pleasing aesthetic appearance.

Abstract: A fluid diffuser and a method for diffusing fluid are provided. In one preferred embodiment, the diffuser comprises a frame adapted to be connected to the end of fluid supply duct. Mounted within the frame is a pore-containing web. The web redirects fluid passing through the pores by changing the direction of the fluid upon exiting the web. Prescribed portions of the web can be blocked to expel fluid preferentially in one direction and expel fluid less in other directions. Other means for controlling the direction and flow of fluid upon exiting the web are provided, including changing the angle of fluid supply to the web, and placing a vane at the entrance to the web.

Abstract: A flexible air duct is provided for conveying and distributing a source of forced air to a room or other area of a building. The air duct includes a flexible outer casing made of an air permeable fabric that evenly disperses the air into the room. To prevent the fabric from sagging when the source of forced air is periodically turned off, a support frame holds the casing in a generally open tubular shape even when the duct's interior and exterior air pressures are the same.

Abstract: A single flow of incoming air through a closed sound-absorbent air-conditioned ceiling is used for air conditioning a room. The flow of incoming air can be temperature controlled. Part of the flow of heat associated with the flow of incoming air is conveyed into the room in the form of heat radiation emitted from the air-conditioned ceiling. The air-conditioned ceiling is manufactured from materials with a high level of heat conductivity for this purpose.

Abstract: A molded plastic air diffusing screen in an air supply system provided for effectively diffusing or deflecting air supplied through a coreless or vane-free duct such that undesirable air turbulence and draft/currents are substantially diminished; more particularly, the novel plastic screen diffuser minimizes noise emanating from the penetrating air supply.

Abstract: Modular ceiling air diffusers are provided in which the core deflector elements are pre-fabricated in a one-hit one-part pressing operation to form a selected pattern of integral louvers shaped to deflect air in a desired horizontal air pattern. This reduces the labor content and material costs in manufacturing modular ceiling air diffusers compared to prior art devices of this kind, without compromising the level of air distribution performance.

Abstract: A fabric sheath (1) for the close protection of the conveyance of sensitive products by sterilized air stream diffusion, in particular in a substantially vertical direction is formed by a sealed wall (2) and a porous wall (3) extending longitudinally and axially along the sheath, the sheath defining a sterilized air supply duct (9). It comprises means (4) extending longitudinally along the sheath that ensure median sterilized air diffusion at a higher speed. The invention also features a washable or disposable laminar-flow hood, comprising a fabric sheath bounded at each end by a plane perpendicular to the axis of the fabric sheath.

Abstract: A fabric air diffuser and a method for diffusing air are provided. The diffuser comprises a frame adapted to be connected to the end of an air supply duct. Mounted within the frame is a flat, open-weave, fabric sheet. The fabric sheet redirects and scatters air passing through the openings in the weave by changing the direction of the air upon exiting the sheet.

Abstract: A system for distributing air through an opening in a ceiling into a room, the ceiling being supported by spaced apart joists or other ceiling structural members, the air being supplied by a duct located above the ceiling, including a plenum having an open top connected to the duct and an open bottom in communication with the ceiling opening. A support bar extends through the plenum and secured at its opposed ends to ceiling structural member. A motor hanger is secured to the support bar. An air diffuser is positioned in communication with the plenum open bottom. A fan motor is supported to the lower end of the motor hanger. A plurality of generally horizontally extending fan blades are attached to and rotated by the motor. Air is passed from the duct through the plenum and diffuser into the room, distribution of the air being augmented by the fan blades as rotated by the motor.

Abstract: An air diffuser apparatus has a box-like air diffuser chamber with sheet metal side walls, that are provided with a series of laterally spaced outlet orifices. Each orifice is formed by cutting out wing portions of the sheet metal on each side of a center line of the orifice and bending the wing portions outwardly to a position inclining toward this center line. The wing portions define an air flow passage tapering in an outward direction. The chamber has a base connected to a lower edge of the side walls that includes a layer of heat insulation material. An upper structure closes the upper end of the chamber and has an inlet opening for introducing pressurized low temperature air into the chamber. This arrangement is highly efficient for diffusion of low temperature air and can be of essentially all-metal construction.

Abstract: An induction diffuser (100), radial flow diffuser (130), linear diffuser (150) and supply or return grille (170) use a fabric face (102, 132, 152, 172) to form the exposed portion thereof. The fabric face is preferably made of fiberglass or Kevlar coated with teflon. The use of the fabric face increases reflectivity of incident light, reduces sound levels, provides a durable and easily cleanable surface and provides other significant benefits.

Abstract: A multiple stage airflow diffuser apparatus for spreading the airflow to provide a uniform airflow in a plenum. The diffuser includes a plurality of diffuser stages positioned in a spaced, nested relationship.

Abstract: An air dispersion system is provided for conveying and distributing a source of forced air to a room, building, or other enclosure. The air dispersion system includes a fabric tube having a proximal end coupled to the source of forced air, a distal end opposite the proximal end, at least one vent formed in the tube, and an air dispersing panel covering each vent. The tube is constructed of an air-porous (i.e., air-permeable) fabric material which allows air from the source of forced air to leak therethrough. The panels, in turn, are constructed of a material having a different relative porosity than that of the tube which causes the air flow dispersion (or leakage) rate through each panel to be different from the air flow dispersion (or leakage) rate through the tube.

Abstract: A condensation preventing vent structure has therein at least one blade including an innermost vent to define a passage for a flow of air. The innermost fin is provided with open upper and lower ends to define therein an inner air flow passage. An air flow damper is provided above or in the innermost fin to restrict the air flow in the central portion of the flow passage.

Abstract: A fabric air diffuser and a method for diffusing air comprises a frame adapted to be connected to the end of an air supply duct. Mounted within the frame is a flat, open-weave, fabric sheet. The fabric sheet redirects and scatters air passing through the openings in the weave by changing the direction and velocity of the air upon exiting the sheet.

Abstract: A fan guard of the freezing chamber in the refrigerator directs the cool air ejected from the cooling fan into the freezing chamber in quantities for shortening the time required for maintaining the optimum ambience of the freezing chamber, economizing the power consumed in the refrigerator and minimizing the cool air which collides against the fan guard and changes the advancing direction thereof to interfere the cooling fan to thereby decrease the noise. For attaining these effects, the fan guard is formed with plural cool air holes and projections for guiding flow of the cool air protrude between the cool air holes toward the cooling fan which circulates the cool air. In another embodiment, a single projection is located on the fan guard and formed between an adjacent pair of the cool air holes and placed along the same axis as the cooling fan.

Abstract: A system is provided for the diffuse ventilation of a vehicle interior in a dashboard area which, for avoiding manufacturing problems and for the purpose of an advantageous mounting, has an insert which is composed of a top and bottom part and which is inserted into the dashboard flush with its top side. In the bottom part, a plurality of separate channels are formed which extend in parallel to one another, are open toward the top, extend in the longitudinal direction of the insert and are covered directly by the top part.

Abstract: A ceiling mounted indoor unit (10) for an air conditioning system of the type that is generally recessed within a false or drop ceiling. The air conditioner has a fan (11) and heat exchanger (12) mounted within an enclosure (20). There is a primary fan suction inlet (31) and a fan discharge outlet (32) in the bottom wall (21) of the enclosure, and an auxiliary fan suction inlet (33) in a side wall (22) of the enclosure, so that at least some of the air entering the enclosure and passing through the heat exchanger will be drawn from the space between the false ceiling and the true ceiling. Air reenters the interceiling space through holes and gaps in the false ceiling. The auxiliary fan suction inlet reduces radiated noise and improves air flow distribution in the room served by the air conditioner.

Abstract: A cooling system which can be fastened on a ceiling with a suspension provided beneath the ceiling disposed above a space to be cooled and with cooling pipes between the ceiling and the suspension wherein the space to be cooled and the space between the ceiling and the suspension are connected with each other through air current paths.

Abstract: An air injection tube for injecting ventilating, cooling and/or heating air for installation in a room where the tube has a plurality of small, mutually spaced air injecting openings defined in its peripheral wall along longitudinally extending wall zones of the tube. The air injection openings are arranged in a plurality of groups or patterns each comprising two or more peripherally spaced rows of openings which are mutually spaced along the length of the zone and the longitudinal spacing of adjacent groups or patterns substantially exceeds the mutual longitudinal spacing of the openings in each group or pattern of openings.

Abstract: A module for the construction of a cleaning room ceiling has a housing wh can be fitted like a tile in the ceiling and which is divided internally into three chambers. A fan in an upper false floor draws air into the housing along an upper chamber which is aligned with a sound-damping lining. Sound-damping baffles are provided on the underside of the upper floor and the upper side and lower floor in the intermediate chamber and the bottom of the lower chamber is closed by high efficiency particle filters.

Abstract: A clean room ventilation system having a diffuser panel attached to a ceiling grid, with a filter element positioned well above the panel. The diffuser panel is perforated throughout its area with increased size and/or density of perforations in a peripheral region to provide increased airflow beneath the ceiling grid. The peripheral regions may further be angled to create a lateral airflow beneath the ceiling grid.

Abstract: A device to produce a high capacity, low velocity, non-aspirating, semi-cylindrical air pattern, to be mounted in a ceiling. The device has a box-shaped backpan connected to a ceiling air duct and a flow directing assembly attached to the backpan and hanging below the ceiling. The flow directing component has a perforated face panel made up of flat surfaces in horizontal and angular planes, forming a substantially semi-cylindrical shape. Inside the face panel are four vanes that span its length, for controlling the direction of air flow. The flow directing assembly can swing away from the ceiling by a hinge along one side, or can be removed entirely using quick release means.