Abstract: A blowout structure of the present invention includes: a case connected to a duct that serves as a blast passage from an air conditioner; a main ventilation passage formed inside the case; a vertical fin that changes a wind direction by rotating in a vehicle left-right direction of the main ventilation passage; and a bypass flow path extending along the main ventilation passage on both sides of the main ventilation passage in the vehicle left-right direction, wherein an outlet of the bypass flow path that joins the main ventilation passage is formed so as to overlap with the vertical fin when viewed in the vehicle left-right direction.

Abstract: An air-conditioning register includes: a movable fin; an operation knob; and a transmission mechanism. A load generating mechanism is provided in a middle of a force transmission path in the transmission mechanism. The load generating mechanism includes a pressure receiving portion, a pressing member, and a spring. The pressure receiving portion has a pressure receiving surface. The pressing member rotates with respect to the pressure receiving portion as the operation knob rotates. The spring generates a load between the pressing member and the pressure receiving portion by urging the pressing member toward a side approaching the pressure receiving surface and pressing the pressing member against the pressure receiving surface. The pressing member and the pressure receiving portion are each formed of a hard resin material, and the pressing member is directly in contact with the pressure receiving surface to generate the load.

Abstract: An air diffuser assembly for transferring airflow from an HVAC system to an environment. The air diffuser assembly comprises a body at least partially located in a duct of the HVAC system and a cover including at least one vent assembly for permitting airflow through the cover and into the environment. The body defines an aperture for transferring airflow from the duct and an air filter is located in the aperture for filtering air transferred therethrough. The cover includes a closed position, wherein the cover is placed against the body to form a cavity, and an open position, wherein the cover is moved from the body to permit access to the filter.

Abstract: An air vent for a vehicle may include: a duct part having an internal path through which air is moved; a first adjusting part rotatably installed in the duct part, and configured to guide the discharge direction of the air while rotated in a side-to-side direction; a second adjusting part rotatably installed in the duct part with the first adjusting part, and configured to guide the discharge direction of the air or block an air flow passing through the duct part, while rotated in a top-to-bottom direction; and an airtightness maintaining part fixed to the duct part facing the second adjusting part, and configured to block the movement of the air while brought into contact with the second adjusting part for opening/closing the duct part.

Abstract: An air conditioner unit includes a blower fan. The blower fan includes a blade assembly and a motor connected to the blade assembly. The air conditioner unit also includes an inlet grille upstream of the blower fan and an outlet grille downstream of the blower fan. The air conditioner unit further includes an automatic louver assembly operatively connected to the outlet grille whereby air flowing through the outlet grille is directed in a first direction when the automatic louver assembly is in a first position and the air flowing through the outlet grille is directed in a second direction when the automatic louver assembly is in a second position.

Abstract: An air vent device for a vehicle may be mounted with an upper rear wing and a lower rear wing within an air duct to be linearly movable along the front-rear direction, and be rotatably mounted with an upper air guide wing and a lower air guide wing at the front end portions of the upper rear wing and the lower rear wing, thereby controlling the wind direction of the air downward while the upper air guide wing rotates downward when the upper rear wing moves forward, or controlling the wind direction of the air upward while the lower air guide wing rotates upward when the lower rear wing moves forward.

Abstract: A register includes an annular fin that can improve the directivity of air conditioning air while suppressing increase in the number of parts. A front fin includes an annular-shaped annular fin portion. A bezel has upstream side inclined surfaces formed on inner peripheral surfaces facing with each other in the shorter side direction (vertical direction) of an air blow outlet. The upstream side inclined surfaces incline toward a direction of approaching the annular fin portion from an upstream side toward a downstream side of an air blowing direction. An air conditioning air flowing in the air blowing direction is guided to the annular fin portion side by the upstream side inclined surfaces.

Abstract: A dual damper device or damper assembly of a vehicle air vent includes a dial support; a dial knob coupled with the dial support so as to rotate in one direction or another direction; a gear bush having an upper end portion coupled to a bottom of the dial knob, and a pinion gear formed at a lower portion; a guide gear having a rack gear part at one side thereof and engaging the pinion gear so as to move forward or backward; and a damper provided to an air channel of a duct housing so as to rotate in one side direction or another side direction. The damper is coupled to the guide gear so that the damper moves according to an amount of a forward or backward movement of the guide gear.

Abstract: A mould tool assembly (10) has a mould tool component (14) having a temperature control face (24) arranged to be in thermal contact with a mould face (12), a temperature control arrangement (26) comprising a fluid outlet (32) directed towards the temperature control face (24); and a thermally conductive structure (40) extending from: (i) a first region in which the structure (40) is offset from the temperature control face (24) and the structure is in the path of a fluid jet (1) emanating from the fluid outlet (32) to (ii) a second region in contact with temperature control face, which second region is spaced from the first region. A diffuser (70; 80; 90) is also provided on the temperature control face for more event mould tool heating.

Abstract: A vent cover assembly is disclosed, such as for a floating or fixed floor. Example vent cover assemblies may include a support plate configured to be secured over a duct, and a flush mount vent cover. The support plate may define a plurality of first airflow apertures configured to permit airflow from the duct through the support plate. The vent cover may define a second plurality of airflow apertures that are positioned in the vent cover such that the second plurality of airflow apertures are aligned with the first airflow apertures when the vent cover is in a first installed position overlying the support plate. The vent cover may obstruct the first airflow apertures when the vent cover is in a second installed position overlying the support plate.

Abstract: Disclosed is an acoustic head for indirectly drying a material, the acoustic head including at least one ultrasonic transducer facing the material, the material having a first side, and a second side, the second side opposite the first side, the second side defining a surface to be dried, the ultrasonic transducer positioned facing the first side; and an air delivery unit positioned facing the first side of the material.

Abstract: The present invention relates to an air vent for a vehicle, the air vent enabling adjusting of an air discharge direction of an air vent, which is for supplying the outside air to the inside of a vehicle, to various angles as well as diffusing the air being discharged.

Abstract: A molded, carved, stamped, or otherwise manufactured apparatus covers an HVAC register. The apparatus provides an air enhanced lounging place for pets while simultaneously facilitating air-flow from the register to a room it is part of. Reinforcing ribs may provide for the directing of airflow under the apparatus to openings in walls of the apparatus. Electronic circuitry, including sensors, processors, or radios, may detect use by a pet, or even contact by a human, and trigger, or transmit a message to, a user's device such as a smartphone or computer. The circuitry may interoperate with an interactive home monitoring system and trigger the streaming of video from its camera(s) focused on, or in proximity of, the accessory apparatus. An application on a user device may process signals transmitted from the apparatus's circuitry to remotely determine information associated with room environment and/or the pet.

Abstract: A vehicle air circulating system comprises a controller, an interior condition sensor attached to the controller, an instrument panel, and a deployable register assembly attached to the controller and pivotably attached to the instrument panel. The register assembly includes a first register and a second register and is movable between a closed position in which the first register is recessed within the instrument panel and is thus obstructed and an open position in which the first register is deployed. The second register remains unobstructed whether the register assembly is in its closed or open position. The deployable registers provide directional control for pull down conditions. Once the desired conditions are achieved, the deployable registers lower into the instrument panel and the other registers provide a larger opening to direct the air overhead at lower velocities keeping the vehicle cabin cool while not blowing in the direction of the occupants.

Abstract: An operating device (10) for an air vent (12) which includes at least one swiveling vane (14), the operating device (10) having a first operating lever (22) which has a first lever arm (30), a second lever arm (34), and a bearing member (38) which is arranged therebetween, the first operating lever (22) being mounted around the bearing member (38) for swiveling about a swivel pin (24), and a second operating lever (26) which has a first lever arm (32), a second lever arm (36), and a bearing member (40) which is arranged therebetween, the second operating lever (26) being mounted around the bearing member (40) for swiveling about a swivel pin (28), the first lever arm (32) of the second operating lever (26) being coupled to the second lever arm (34) of the first operating lever (22) and the second lever arm (36) of the second operating lever (26) being adapted to be coupled for swiveling motion to the vane (14).

Abstract: A unique electrical switchgear system may include a circuit breaker compartment having a compartment wall. The electrical switchgear system may also include a tapered floor pan mounted on the compartment wall. The floor pan may have two side walls disposed oblique to each other; a back wall; and a top wall coupled to the side walls and defining a discharge opening adjacent to the back wall. The two side walls, the top wall and the compartment wall may form a tunnel for channeling cooling air in a first direction. The back wall may be operative to redirect the cooling air in a second direction different from the first direction for discharging the cooling air from the discharge opening.

Abstract: The invention relates to an air outlet comprising a housing, an operating element arranged on the visible side of the air outlet, a first air-guiding element and a closure element, wherein the operating element has a handle and a lever-like rotary element, wherein the pivot point of the rotary element is arranged on the handle, wherein the rotary element is mechanically coupled to the closure element via a first coupling in order to adjust the intensity of the air that can flow out from the air outlet, wherein the handle can be moved in a first direction and is mechanically coupled to the first air-guiding element via a second coupling in order to adjust the outflow direction of the air that can flow out from the air outlet, wherein the outflow direction lies in a first plane having the first direction, wherein the first coupling is operatively connected to a first lever, wherein the pivot point of the first lever is arranged on the second coupling, wherein the second coupling has a second lever, wherein the

Abstract: A fusing apparatus includes a fusing section, a supplying section and a control section. The supplying section supplies airflow between a recording medium and the fusing section. The supplying section includes a supplying opening of the airflow divided in a plurality of blocks along a width direction of the recording medium. The control section controls at least any one of speed of the airflow and supply amount of the airflow individually for each of the plurality of blocks based on information regarding the recording medium.

Abstract: Disclosed is both a method and apparatus for delivering cooling air to an electronics rack in a data room in an energy efficient manner. The present apparatus provides directionally delivered cooling air to an electronics rack with usage rates up to 90%. The tiles utilize angled directional vanes for delivering the cooling air. The tiles both conserve energy and increase the overall possible power usage for each cabinet. The tiles greatly increase the cooling efficiencies in the data room and conserve energy.

Abstract: A device for altering the airflow pattern from a ceiling vent diffuser. The device comprises a flexible member that is secured to a diffuser vane by a spring-biased hook and one or more tabs. A release button on the outer surface of the device is depressed to pivot the hook out of engagement with the vane. The device is complementary shaped to a region of the diffuser. When installed, the device blocks the openings in that region and substantially prevents air from flowing out of the openings. One or more devices may be installed in selected regions to block airflow from those selected regions. A plurality of devices may be utilized to completely prevent airflow from the diffuser.

Abstract: An electronic device. The electronic device comprises a heat source, a housing having an inlet and an outlet, a fan disposed in the housing and selectively rotating at a first speed and a second speed higher than the first speed to generate air flow in the housing to cool the heat source, and a plurality of louvers disposed on the housing, having adjustable angles and selectively positioned at a first angle and a second angle. When the louvers are positioned at the first angle, the fan rotates at the first speed, and when the louvers are at the second angle, the fan rotates at the second speed.

Abstract: A retrofit grille frame for retrofitting an existing ventilation assembly used in security settings comprises a frame having an outer periphery sized larger than an opening for the existing ventilation assembly. The frame has at least one inner edge defining a vent opening in the frame. The vent opening is free of any projection of substantial length extending inwardly from any inner edge. The frame has a grille member receiving portion defined on an inner side for receiving a grille member and retaining the grille member in place when the frame is installed and at least one attachment portion capable of receiving a fastener for attaching the frame and a grille member to the existing ventilation assembly.

Abstract: An electronic device. The electronic device comprises a heat source, a housing having an inlet and an outlet, a fan disposed in the housing and selectively rotating at a first speed and a second speed higher than the first speed to generate air flow in the housing to cool the heat source, and a plurality of louvers disposed on the housing, having adjustable angles and selectively positioned at a first angle and a second angle. When the louvers are positioned at the first angle, the fan rotates at the first speed, and when the louvers are at the second angle, the fan rotates at the second speed.

Abstract: The object of this invention is to provide a vent assembly with a hinged grill unit for automobiles. In this vent assembly “A”, the grill unit (1) consists of a grillwork (11), and a grillwork holder (10) holding the grillwork (11) therein. Two hinge shafts (15) are provided at the holder for acting as a hinging means for hinging the grill unit to the housing. A drive member (3) is provided at a lower portion of the holder at a position vertically aligned with the hinge shafts (15), and engages with a reduction gear (32) of a motor (33) installed in the dashboard “B”. This grill unit (1) is rotatably set in the housing by the hinge shafts such that the grill unit is rotated around the shafts relative to the housing by a power of the motor transmitted to the drive member (3) through the reduction gear.

Abstract: The present invention relates to an air-distribution cap which is to be fitted on top of a heating or air-conditioning unit with natural or forced convection and the function of which is to regulate both the flow-rate and the direction of the air output by the convector. In particular, the present invention relates to a cap (1) for distributing the air output by a heating or air-conditioning unit with forced convection or with natural convection, characterized in that it comprises a deflector (3, 103) having one or more vanes (13, 113), each vane being orientable so as to adopt a position in which it is inclined to the vertical so that its outer end faces towards the wall against which the unit is fitted.

Abstract: Air-accumulating chamber of a roof air duct has a non-branched configuration and is located substantially centrally in a widthwise direction of a vehicle. Air emission port sections emit conditioned air from the air-accumulating chamber toward respective rear seats. In each of the air emission port sections, a sawtooth-like surface is formed on each port base member and a resilient locking protrusion is provided on a grill for meshing engagement with the sawtooth-like surface. Air emission port, air-conditioner operating section and room lamp are provided together as a unit on the port base member.

Abstract: Disclosed is a vent grill for a vehicle capable of simplifying the manufacturing process, decreasing the installation space, and supplying conditioned air extensively. The vent grill comprises a cover fixed to one end of the duct and provided with a circular installing hole and a guide groove formed below the circular installing hole. At the cover, there is installed a main body including an opening through which air is exhausted, plural wings rotatably installed at the opening, an interlocking member connecting the respective wings such that the respective wings are rotated at the same time, and a knob installed at either one of the respective wings.

Abstract: A rotatable air vent including an outer circular housing having an inner surface and an outer surface. The outer circular housing has an interior ring rotatably coupled with the inner surface. The interior ring has a plurality of inwardly extending radial connectors secured thereto in a spaced relationship. An inner ring is disposed within the outer circular housing. The inner ring has an inner surface and an outer surface. The outer surface is secured to the radial connectors. A plurality of blades extend within the inner ring.

Abstract: An air conditioning unit discharge opening includes an inlet and outlet side and a pair of spaced walls. Each of the walls has a mounting pin formed thereon, which extends in a direction toward the other wall such that the mounting pins together define a longitudinal axis extending therebetween. An air discharge nozzle has an inlet side and an outlet side and a pair of spaced substantially planar walls. The nozzle is configured to be received within the air discharge opening with the planar walls of the nozzle in closely adjacent relationship with the planar walls of the discharge opening. Pin receiving conformations are formed on each of the planar walls of the nozzle. Each of the conformations includes an open ended slot extending into the wall from the inlet side and an arcuately shaped pin receiving socket formed at the inner end of the slot.

Abstract: An oscillating drive mechanism for an air discharge nozzle, which is mounted for pivotal movement about an axis. The discharge nozzle includes end plates, each having a pivot pin extending along the pivot axis. One end plate has an elongated slot therein spaced from the pivot pin. The pivot pins are supported at opposite ends by support structure, which allows pivotal movement of the nozzle about the axis. The support structure adjacent one end includes an opening therethrough spaced from the axis and configured such that the elongated slot and one end plate will sweep across the opening as the air discharge nozzle pivots through a predetermined desired arcuate sweep. A drive motor having a drive axis is attached on the opposite side of the support structure, opposite the through opening. A drive mechanism is disposed in the opening.

Abstract: A fresh air nozzle device (10) for the passenger compartment of a vehicle, having a housing (12) which at the outlet side is provided with slats (30) for guiding the air flow and which has a slat-adjusting member. At the outlet side the housing (12) has a circular opening end portion (14) on which there is rotatably provided an adjusting ring (22) forming the slat-adjusting member. The slats (30) are connected to the adjusting ring (22). The opening end portion (14) of the housing (12) is formed with two diametrally oppositely disposed longitudinal slots which are oriented in the peripheral direction of the housing (12) and through each of which extends a respective connecting pin (34). The two connecting pins (34) are axially aligned with each other and they serve for connecting the adjusting ring (22) to an inner ring (24) which is provided with the slats (30).

Abstract: An improved ventilation register for a vehicle and the like is provided which comprises an elongated housing adapted to be mounted in a vehicle and having an inlet opening adapted to be connected to a source of air and an outlet opening adapted to distribute the air into a vehicle compartment. A grille assembly is mounted in the outlet opening of the elongated housing and comprising a grille housing having an inlet opening in register with the inlet opening of the elongated housing and an outlet opening in register with the outlet opening of the elongated housing. At least one directional vane can be mounted in the grille housing which is adapted to direct the flow of air passing through the outlet opening of the elongated housing.

Abstract: An air outlet vent (1) adapted to be mounted in a floor (6) and connected to a heating, ventilating and air-conditioning air supply duct (30) includes a cylindrical housing (2) and a cover plate (4) that covers the top open end of the housing (2). The plate (4) includes a first group of air outlet openings in the form of concentric circular arcuate slits (11) extending over a first sector of the plate (4), and a second group of air outlet openings in the form of radially extending slits (12) in a second sector of the plate (4). The plate (4) is rotatably adjustable in the housing (2). With this arrangement, the direction of the main air flow axis of the air flow pattern generated by the vent can be infinitely rotationally adjusted around an imaginary inverted cone, to direct the air flow where desired and avoid undesirable drafts, while still providing a highly turbulent twisting or spiraling air flow characteristic.

Abstract: Modular terminals for supplying conditioned air to spaces within buildings can be mounted and configured to provide improved heating, cooling, ventilation, and mixing of the supplied air with the space air. The flexibility in arranging the modular terminal components, such as air inlets, outlet grilles, dampers, and induction sleeves, permits for selectively altering the flow pattern, quality, volume, and velocity of air introduced into a space. The modular terminals can selectively draw air from a plenum, duct, or both. The terminals accommodate electrical wiring for office equipment, and also may accept flexible ducting to deliver conditioned air from a desktop or other furniture. The modular terminals also are part of a system and method for conditioning building spaces whereby a number of terminals are controlled in response to selected sensor readings. Various air handling units combine with the terminals to cycle the air and supply a source of filtered and conditioned air to the terminals.

Abstract: A venting nozzle has a housing having an air inlet through which an air flow enters the housing. The housing has an outlet through which the air flow exits. The outlet has deflection elements for deflecting the air flow. Parallel flaps are pivotably connected in the housing for shutting off the air flow. Meshing gear segments are positioned in the housing and connect the flaps. The meshing gear segments are arranged outside the air flow. A rotary control is coordinated with one of the flaps for controlling positioning of the flaps.

Abstract: Apparatus for deflecting the flow of supply air discharged from an air conditioning unit that includes a stationary frame mounted in the discharge duct of the unit cabinet. An inner frame is pivotally mounted within the outer frame. The inner frame contains horizontally aligned and vertically aligned louvers mounted therein. A remotely controlled motor is coupled to the inner frame for tilting the inner frame upwardly or downwardly to selectively direct the flow of supply air leaving the unit. The unit can be adapted for manual adjustment of the louvers by removing the motor and locking the inner frame to the outer frame.

Abstract: The present invention is a heating and cooling airway vent (12) that provides improved airflow directional control and is easier to manufacture, assemble, and install in building airway systems. The airway vent (12) includes a housing (14) having a number of fixed louvers (16) as well as a plurality of rotatable circular openings (18) in which circular inserts (20) are rotatably mounted. The circular inserts include curved louvers (22) that are angled with respect to the vertical and that are curved slightly outward. The circular inserts (20) can be rotated to direct their louvers (22), and hence the issuing air, in any desired direction. The circular inserts (20) are snap-locked into the housings (14). The vent (12) includes one or more dampers (26) operated by a damper switch (28). The damper switch (28) is connected to the housing using a guide slot (46) having ridges (48) that aid a user in keeping the damper switch (28) in a particular position.

Abstract: An outlet assembly for providing universal directability of air therethrough. The assembly includes a housing with a first barrel pivotally connected in the housing about a first axis A. A second barrel is pivotally connected within the first barrel about a second axis B perpendicular to the first axis A. Fixed position louvers are connected to the second barrel.

Abstract: A damper door controller is provided for remotely controlling damper doors of a cooler/heater unit of an automotive air conditioner. The controller comprises a knob holder; at least one rotary knob rotatably connected to the knob holder; a pinion coaxially connected to the rotary knob to rotate therewith; an elongate guide slot formed in the knob holder; a rack member slidably received in the guide slot, the rack member being operatively meshed with the pinion; a cable assembly including a control cable and a sleeve in which the control cable slides, the control cable having a leading end fixed to a leading end of the rack member; and a clamp member provided by the knob holder and extending across a generally middle portion of the guide slot to clamp a leading end of the sleeve.

Abstract: A grill assembly comprising an anchor member adapted to fit in a duct around the periphery of a duct opening. Tie members may be slidably attached to the anchor member so that it projects outwardly from the anchor member for receiving a frame. A damper and cover may be subsequently attached to the frame.

Abstract: An outlet nozzle assembly (10) includes a pivotal cover (20) which lies flush with the mounting structure (12) in the closed position and which pivots at one end (22) to be outwardly angled with respect to the mounting structure (12) in the open position exposing the outlet housing (18). The amount of opening may be manipulated through a ratchet mechanism (54). The cover (20) allows the outlet housing (18) to be invisible within the mounting structure (12) during non-use.

Abstract: An air conditioner includes a housing having an air inlet at its lower end. An air outlet is formed in an air discharge member which is mounted at an upper end of the housing. The discharge member is vertically movable relative to the housing, whereby the outlet is closed by a portion of the housing when the discharge member is in a lowermost position and becomes progressively opened as the discharge member is raised. Sensors are provided for detecting various positions of the discharge member during its vertical movement. The discharge member is moved by a main electric motor, and an auxiliary motor is moved into an operative position for vertically moving the discharge member when the main motor malfunctions.

Abstract: An outlet assembly (10) is assembled from different shaped end modules (14,16,18) and any number of standard intermediate modules (20). Depending on the desired shape and length of the assembly (10), two of the end modules (14,16,18) are selected with any number of the intermediate modules (20) assembled therewith forming a housing (22). The housing (22) may form the barrel housing pivotable within a support (68). Louvers (76) and vanes may be connected therewith.

Abstract: A directional vent register having a primary grill in a generally conventional position in a top plate which pivots to expose and open a secondary grill which directs the air in a forward direction.

Abstract: This is an air register having a grille member pivotally attached to the register housing. A spring is disposed between the grille member and the register housing which biases the grille member in an upward, diagonal extended position from the central passageway formed inside the register housing. During use, the grille member is automatically disposed in an upward, diagonal extended position which deflects the exiting air at an angle into the room. When a downward force is applied to the top surface of the grille member, say by a person's foot, the grille member is able to pivot downward around one edge into a retracted position inside the central passageway. The air register also includes a pair of overlapping plates controlled by a control knob which control the amount of air exiting from the air register.

Abstract: A barrel type air outlet is provided for an opening in an instrument panel or other panel or compartment of a vehicle. The air outlet contains two sets of stationary vanes for directing a stream of air. The first set of stationary vanes is oriented parallel to the longitudinal and transverse axes of the barrel and to one another to direct the stream of air in a jet flow pattern. The second set of stationary vanes is oriented parallel to the longitudinal axis and nonparallel to the transverse axis and nonparallel to one another to direct the stream of air in a diffuse pattern to avoid direct impingement of the stream of air on the driver or other occupants of the vehicle.

Abstract: An air-conditioner outlet mounted into the holes predetermined on the wall comprises a seat with multiple wind outlets having a slot therein for slidably receiving a pushing button to adjust a plurality of movable leaves horizontally and elevationally. A link having a series of holes is connected with a plurality of movable leaves through the connection with the second lower protrusions provided at the other part of the lower end of the movable leaves with the holes of the link. Therefore, the pushing button is able to adjust the movable leaves by means of the connection between the second lower protrusions and the holes of the link.

Abstract: A directional vent register having a primary grill in a generally conventional position in a top plate which pivots to expose and open a secondary grill which directs the air in a forward direction.

Abstract: An air outlet louver assembly (10) includes a housing (16) defining a first direction (40) of airflow, a louver support (42) which rotates about a support axis (44) within the housing (16), and a first set of fixed vanes (56) extending radially from the louver support (42) for directing airflow from the first direction (40) to a second direction (58). A second set of fixed vanes (60) extend radially from the louver support (42) for directing airflow from the first direction (40) to a third direction (62).

Abstract: A register for controlling air flow to or-from a vent has a front with a grille for allowing full air flow. Plates within the register are movable over the vent opening to affect the air flow. The plates may include a louver to redirect the air flow, and an imperforate plate to diminish or stop air flow. Studs on the plates extend through the front member and receive knobs for controlling the movement of the plates. A register with only the imperforate plate can be used over the return vent.