Abstract: A vent assembly has a vent cover and sliding air flow regulator for controlling the flow of air through the vent cover. Plural sets of unique couplers may be used to interconnect the air flow regulator and vent cover for relative sliding motion. Desirably, two such couplers are provided at each end of the assembly with an associated one of such couplers being adjacent to each of the corners of the assembly in the event a rectangular assembly is provided.

Abstract: The invention teaches and shows systems, devices and methods for controlling the automation of ventilation registers. In one embodiment, the invention is a system for articulating a register for a heating or air-conditioning system. The system generally includes a local power source, a means for receiving a wireless signal, a means for switching a drive means on, a drive means, and a movable member.

Abstract: A wooden vent cover has fixed vanes with major vane surfaces at angles which enhance the throw and spread of air flow through the vent cover. A vent assembly with a wooden vent cover having optimized vane major surface angles including an air flow regulator in combination with the wooden vent cover. The air flow regulator may be a slidable member or other configuration and may be held in place by couplers.

Abstract: A vent assembly has a vent cover and sliding air flow regulator for controlling the flow of air through the vent cover. Unique couplers may be used to interconnect the air flow regulator and vent cover for relative sliding motion. In addition, actuator mechanisms are used to move the air flow regulator between open and closed positions. A vent assembly for corner applications is also disclosed.

Abstract: An automated and adjustable air diffuser mechanism for placement in a floor opening in a raised access flooring system having an air distribution plenum under the floor. The mechanism comprises a first, fixed circular hanging frame member, and a second, movable, generally circular dust trap member concentric with the first hanging frame member. The second member is movable relative to the first member to adjust the free area of the air passages located along the circumference of the first and second members, whereby to vary the airflow delivery from the distribution plenum to the room area above the mechanism.

Abstract: An automated and adjustable air diffuser assembly for placement in a floor opening in a raised access flooring system having an air distribution plenum under the floor. The assembly comprises a fixed circular hanging frame member, a suspendable fixed frame member secured thereto, a removable grill member mounting a floating debris/liquid retention basin, and an electric motor operating a plurality of push rods to raise and lower the retention basin.

Abstract: A register for regulating the passage of air to be mounted in a vent opening of a wall, floor, or ceiling. The register includes a grill having a plate with grill openings for the passage of air therethrough, a frame connected to the bottom of the grill, at least one damper for regulating the air flow through the register, a pivotal connection connecting the dampers to the frame to allow pivotal movement there between, a biasing mechanism urging the damper against the frame to reduce rattling and vibrations there between, and a control mechanism for moving the damper between an open position permitting air to flow through the register and a closed position wherein air is inhibited from flowing through the register. The control mechanism includes a lever and a control bar. The biasing mechanism includes springs mounted to the control bar and pivotally connected to the damper wherein there is one spring individually urging each damper The leyer and control bar each move through a separate arc.

Abstract: A modular air vent assembly kit can be used to cover duct openings that supply a flow of heated or cooled air to a room in addition to covering duct openings that receive return air from a room. The modular air vent assembly kit is comprised of a frame, a base, a damper mechanism, and two different face plates where the damper mechanism can be selectively assembled into the base depending on whether control through the air vent by operation of a damper is needed in the particular duct opening and where either of the two face plates may be selectively connected with the base where one face plate has a lattice and is used in combination with the damping mechanism and the other face plate has a series of louvers and is used when the damping mechanism is not used in the vent assembly. The frame is secured to an air duct opening and the base and attached face plate are removably attachable to the frame without the need for separate fasteners.

Abstract: A register to be mounted in a vent opening of a wall, floor, or ceiling for regulating the passage of air. The register includes a grill having a plate with grill openings for directing the passage of air therethrough, a frame connected to the bottom of the grill, at least one damper for regulating air flow through the register, a pivotal connection connecting the damper to the frame to allow pivotal movement therebetween, and a control mechanism for moving the damper between an open position permitting air to flow through the register and a closed position wherein air is inhibited from flowing through the register. The damper has first and second connecting ears extending from a major plane of the damper in directions opposite from one another. The control mechanism is pivotally connected to at least one of the connecting ears and includes a control bar having a spring member biasing the damper towards the frame.

Abstract: A vent register for controlling the flow of air from a heating and cooling duct system. The register includes a rack and pinion operating mechanism for controlling the movement of the damper louvers. The louvers are molded with an integral pinion gear and rotatably mounted within a rectangular housing. A slidably movable lever having a lineal rack of teeth is disposed within the housing. A portion of the lever protrudes above the face of the register for manipulation by the user and the rack of teeth engage the pinion gears of the louvers. The linear adjustment of the lever within the housing is translated to rotational adjustment of the louvers by the rack and pinion operating mechanism.

Abstract: An air vent covering assembly is provided which is adapted to be mounted to a floor, in the peripheral region of an air vent opening therethrough. The air vent covering assembly comprises a cover plate, abase, at least one damper plate, and first and second brackets. The cover plate and base have a plurality of spaced-apart and substantially parallel louvers formed therein, and each of the plurality of louvers defines an edge of a space. Each of the at least one damper plate includes a plurality of spaced-apart and substantially parallel damper bars, and the number of damper bars is equal to the number of louvers provided. When the damper plate is in an open position, flow of air through the spaces defined by the plurality of louvers is allowed, and when the damper plate is in a closed position, flow of air through the spaces is precluded.

Abstract: An air grating where the air flow is controlled by a grid movable between OPEN and CLOSED positions. Control means acts when the movable grid arrives at either a warm or a cool limiting position. The arrival at a limiting position prepares said moving means for movement to the other limiting position when a later thermostat signal is received.

Abstract: A diffuser adapted to regulate air flow from an underfloor air distribution system. A grille sits on a dust receptacle or basket-shaped housing that is supported by a mounting assembly in the floor. A flow regulator or damper nests inside the housing. Both the housing and the flow regulator have air slots extending through their side walls. Air from the underfloor air plenum passes through these slots into the diffuser and is forced through helical slots in the grille into the room above the diffuser. The air flow rate can be adjusted by rotating the flow regulator within the housing so that the slots in the flow regulator are either in or out of registry with the slots in the housing. The flow regulator can be rotated by turning the grille. The grille and mounting assembly have indicators that give a visual indication of the position of the flow regulator with respect to the housing, the opening of the slots, and the flow rate through the diffuser.

Abstract: A modular air vent assembly kit can be used to cover duct openings that supply a flow of heated or cooled air to a room in addition to covering duct openings that receive return air from a room. The modular air vent assembly kit is comprised of a frame, a base, a damper mechanism, and two different face plates where the damper mechanism can be selectively assembled into the base depending on whether control through the air vent by operation of a damper is needed in the particular duct opening and where either of the two face plates may be selectively connected with the base where one face plate has a lattice and is used in combination with the damping mechanism and the other face plate has a series of louvers and is used when the damping mechanism is not used in the vent assembly. The frame is secured to an air duct opening and the base and attached face plate are removably attachable to the frame without the need for separate fasteners.

Abstract: An air grating where the air flow is controlled by a grid movable between OPEN and CLOSED positions. Control means acts when the movable grid arrives at either a warm or a cool limiting position. The arrival at a limiting position prepares said moving means for movement to the other limiting position when a later thermostat signal is received.

Abstract: A register assembly for covering an air duct opening is comprised of a faceplate, a base, a damper mechanism and a filter frame that are easily assembled together. Most if not all of the component parts may be constructed of plastic reducing the manufacturing cost of the register assembly. The faceplate can be snapped onto the base or manually removed from the base without the use of fasteners or tools. The faceplate is replaceable, allowing the use of various ornamental designs of the faceplate grid on the same base containing the damper mechanism and filter frame. The filter frame is easily removed from the base to allow replacement or cleaning of the filter materials supported in the frame.

Abstract: An air duct has a rectilinear face plate with an internal face and an external face. The face plate has a rectangular, central opening with a height and width less than the lengths of the edges to form a solid periphery of between about 1.0 and 2.0 inches around the edges of the face plate. The central opening has a series of air directing grates creating a plurality of rectangular shaped slots. A rectilinear housing has two parallel long side walls and two parallel short end walls oriented perpendicular to the internal face and have external edges coupled to the interior face of the face plate adjacent to the opening. Each end plate contains two large bores and one small bore. A pair of similarly configured rectangular flappers, slightly wider than 50 percent of the height of the opening and slightly shorter than the width of the opening, have a formed cylindrical extension rotatably received within the large bores.

Abstract: A register assembly for covering an air duct opening is comprised of a faceplate, a base, a damper mechanism and a filter frame that are easily assembled together. Most if not all of the component parts may be constructed of plastic reducing the manufacturing cost of the register assembly. The faceplate can be snapped onto the base or manually removed from the base without the use of fasteners or tools. The faceplate is replaceable, allowing the use of various ornamental designs of the faceplate grid on the same base containing the damper mechanism and filter frame. The filter frame is easily removed from the base to allow replacement or cleaning of the filter materials supported in the frame.

Abstract: A modular air vent assembly kit can be used to cover duct openings that supply a flow of heated or cooled air to a room in addition to covering duct openings that receive return air from a room. The modular air vent assembly kit is comprised of a base, a damper mechanism, and two different faceplates where the damper mechanism can be selectively assembled into the base depending on whether control through the air vent by operation of a damper is needed in the particular duct opening and where either of the two faceplates may be selectively connected with the base where one faceplate has a lattice and is used in combination with the damping mechanism and the other faceplate has a series of louvers and is used when the damping mechanism is not used in the vent assembly.

Abstract: An air diffuser for underfloor air and electrical distribution systems, which can be rapidly converted to a cable grommet assembly, is provided with a diffuser grille having generally helical slots that produce a swirling air flow pattern with low impulse, low turbulence and high induction of room air. The helical air slots allow the grille to be rotated or spun off a mold, which allows the grilles to be molded more rapidly and economically. The grille sits on a housing which contains a flow regulator. Both the housing and the flow regulator have side walls with air slots. The regulator is connected to the grille and can be rotated by rotating the grille to regulate that air flow through the diffuser. The air diffusers and cable grommet assemblies are supported by common mounting systems that can be installed through the floors overlying an air distribution and/or electrical cable plenum.

Abstract: An air diffuser is adapted to be fluidly connected to an air duct. The air diffuser comprises a face and a unitary valve assembly. The face comprises a number of openings separated by louvers, which are preferably of a fixed angular orientation. The unitary valve assembly comprises vanes that are rotatably attached to a body by a deformable web that is integral to the valve assembly body and the vanes. The vanes are adjusted by means of an adjustment arm that extends from each vane through the openings in the face. The unitary valve assembly is preferably constructed of a single piece of material that is shaped so that it will attach to the face. The valve assembly is unitary, requiring no assembly except to the face. The deformable webs are sized so as to give a high cycle life to the assembly, and allow the vanes to be fixedly adjusted.

Abstract: An apparatus for controlling a flow of air from an air supply into a room having a floor, a ceiling, a wall, and a vertically extending passage disposed in the wall that communicates with the air supply and that extends from adjacent the floor to adjacent the ceiling includes an upper outlet disposed adjacent the ceiling that is in communication with the passage. In addition, the apparatus includes a lower outlet formed in the wall and disposed adjacent to the floor. The lower outlet is in communication with the passage and includes a first damper disposed in the passage that is movable between a closed position impeding air from flowing out the lower outlet and into the room, and an open position disposed from the closed position permitting air from the air supply to flow through the lower outlet into the room.

Abstract: A forced air vent register that is adapted to house pieces of flooring identical to the surrounding flooring. The register is of sufficient structural strength to withstand distortion under considerable forces.

Abstract: A floor mounted adjustable airflow assembly for use with an underfloor air distribution or diffuser system. The assembly comprises a circular grate housing nesting a rotatable and removable, circular grate mechanism, where the assembly includes a cam riding, continuous sleeve that may be recessed by rotation of the circular grate mechanism for full air flow, or extended to close off air flow, or readily set at selected positions therebetween as a means to control air flow from an underfloor plenum to the space above the floor.

Abstract: A vent coupler has first and second leg portions and a latch element extending between the leg portions. The coupler may be formed from a single piece of wire and be detachably coupled to a vent damper. The latch element is inserted into a respective air flow slot of a vent cover to engage the vent cover and couple the vent cover to the damper. The coupler may be constructed to permit flexing of the coupler during the insertion process, with the coupler being biased to engage the vent cover when no longer flexed. The vent coupler may snap onto and grip upper and lower edges of an end wall of the damper housing to mount the coupler to the damper. A filter housing may be detachably coupled to the damper housing to support a filter on the opposite side of the damper housing from the vent cover.

Abstract: An air diffuser assembly for use in combination with an underfloor air distribution system, where the system includes in part a cavity under a floor, having an upper surface, transmitting air under pressure to selected locations above the floor. The air diffuser assembly comprises first and second annular rings threadably engaging one another and secured respectively to above and below the floor, where the first annular ring includes an annular shoulder for receiving a grill assembly. The grill assembly is seated on the shoulder and is in communication with the space above the upper surface. The grill assembly further includes a centrally disposed, downwardly extending, vertically adjustable rod mounting a circular basket at its free end. The basket includes an array of through holes for delivering pressurized air from the underfloor cavity to the diffuser assembly, and means, such as a rod, connecting the basket to the grill assembly to prevent rotation of the basket.

Abstract: A vent assembly includes a vent cover which is detachably mounted to a damper housing. Couplers mounted to the damper housing each have a catch portion which is inserted into a respective air flow slot of the vent cover to engage the vent cover and couple these components together. The couplers may be constructed to permit flexing of the couplers during the insertion process, with the couplers being biased to engage the vent cover when no longer flexed. A filter housing may be detachably coupled to the damper housing to support a filter on the opposite side of the damper housing from the vent cover.

Abstract: A register includes a faceplate having a central area with openings to permit air flow, a box-like housing attached to one side of the faceplate including walls extending about the periphery of the central area, and adjustable dampers supported within the housing between opposed walls for controlling the amount of air flow through the register. The dampers are connected to an adjustment wheel mounted to one of the housing walls. As the adjustment wheel is rotated, a spring member connected between the adjustment wheel and the dampers causes the dampers to rotate about pivot rods extending from each end of the dampers through opposed housing walls. The dampers are assembled into the housing by inserting one pivot rod through a bore in one wall and moving the other pivot rod along an opposed wall within a guide channel which guides the pivot rod into registration with a bore in the opposed wall.

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: A register assembly for covering an air duct opening is comprised of a faceplate, a base, a damper mechanism and a filter frame that are easily assembled together. Most if not all of the component parts may be constructed of plastic reducing the manufacturing cost of the register assembly. The faceplate can be snapped onto the base or manually removed from the base without the use of fasteners or tools. The faceplate is replaceable, allowing the use of various ornamental designs of the faceplate grid on the same base containing the damper mechanism and filter frame. The filter frame is easily removed from the base to allow replacement or cleaning of the filter materials supported in the 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 air diffuser for under floor air and electrical distribution systems, which can be rapidly converted to a cable grommet assembly, is provided with a diffuser grille having generally helical slots that produce a swirling air flow pattern with low impulse, low turbulence and high induction. The helical air slots allow the grille to be rotated or spun off a mold, which allows the grilles to be molded more rapidly and economically. The grille sets on a housing which contains a flow regulator. Both the housing and the flow regulator have side walls with air slots. The regulator is connected to the grille and can be rotated by rotating the grille to regulate that air flow through the diffuser. The air diffusers and cable grommet assemblies are supported by common mounting systems that can be installed through the floors of overlying an air distribution and electrical cable plenum.

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: A register of a forced air system to include an injector and a damper switch to regulate a thermostatic element for heated and air-conditioned airstreams. A direct drive mechanism to allow the thermostatic element to control the movement of a sliding grill.

Abstract: An air flow register comprises a housing which is open at upper and lower ends and comprises a peripheral outwardly projecting flange at the upper end and a skirt portion which depends from the flange, the register further comprising a cowl which is pivotally mounted in the housing and which carries a plurality of spaced inclined air deflection vanes, the cowl being pivotable between a first position in which the cowl is raised to direct air from the register across a surface in which the register is located and a second position in which upper edges of the air deflector vanes extend substantially flush with the flange and in which the cowl abuts the housing skirt portion to close air flow through the cowl.

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 vent screen and vent apparatus includes a vent duct along with an exterior grill connected to one end of the vent duct. The exterior grill includes a screen access opening. A vent screen support assembly is connected to the vent duct between the vent duct and the exterior grill. The vent screen support assembly includes a transverse screen supporting track supported by the vent duct and a longitudinal screen supporting track connected to the transverse screen support portion. A vent screen is installed through the screen access opening and is supported by the vent screen support assembly. The exterior grill includes a plurality of grill slats. An adjustable vane assembly is supported by the vent duct, and a manually operated vane adjustment handle is connected to the adjustable vane assembly for adjusting the adjustable vane assembly. The exterior grill includes a pair of long grill sides and a pair of short grill sides.

Abstract: An air distribution unit for mounting in the wall or floor of a room having a plenum space behind the wall or floor, comprises a housing having an air inlet for communication with the plenum space and an air outlet; a blower between the air inlet and air outlet for drawing air from the plenum space and exhausting it through the air outlet into the room; and a grill assembly mounted over the air outlet. The grill assembly has aerodynamically profiled air distribution channels which may be circumferentially disposed, extending between the upper and lower surfaces thereof. The air distribution channels open out onto the upper surface of the grill assembly at a shallow angle in a radially outward direction so that air flowing out of said channels is directed outwardly at an angle of between about 15.degree. and 45.degree. to the plane of the grill assembly.

Abstract: A mechanical control device for the air flowing through air conditioning outlets. A control assembly with a lever that can be adjusted in two or more predetermined positions for different settings of air flow direction and volume. The lever lodges in two or more respective bays in a plate that locks the lever firmly in one of the preselected positions. The control assembly is mounted typically at a readily accessible position on a wall. A shielded cable assembly is controlled by the control assembly at one end and the other end is connected to the adjustable fins found in conventional air conditioning outlets. The shielded cable is hidden and routed from the wall mounted control assembly to the outlet protruding from the ceiling. The fins are commonly connected and spring biased to a preset position.

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: A floor well air distribution outlet for forming a trumpet shaped air stream includes a cylindrical casing the open upper end of which is covered by a distribution disk having radially extending slots. A plate spaced below and parallel to said disk includes an inflow opening concentric with the disk. The radial outermost extremities of the slots are defined by soffits sloping downwardly toward the axis of the disk. A first series of soffits is inclined at a steeper angle than the soffits of a second series intervening between the first series. A cover plate includes radially extending tongues partially overlying the slots, the radial extent of the tongues being such as to overlie the innermost radial extremity of the slots of the second series only. A valve is vertically shiftable between two positions respectively unblocking or blocking the inflow opening.

Abstract: A modular forced-air register includes two main sub-assemblies. A housing with an opening can be disposed into a hole in the floor of a room. A second sub-assembly includes a louver plate with a grid work of tri-directional vanes. Air flow is controlled by a slide grille disposed beneath the grid work and carrying an integral filter substrate secured to the slide grille. The two sub-assemblies are detachably connected to each other by an arrangement of bosses and recesses as well as a projection mounted on a flexible tang configured and disposed to engage a pocket configured in a thin wall region of the opposing sub-assembly.

Abstract: A circulation air distributing system for supplying fresh conditioned, hot or cold air through the use of cells metal cellular flooring. Distribution box inserts are uniformly distributed along the cellular flooring units prior to concrete placement. Selected distribution box inserts are activated to provide individual control means including diffuser means, for supplying individual workstations with fresh air at the volume, the temperature, and in the direction desired by the occupant. Air movement is from the floor surface upwardly toward the ceiling and into a return plenum space provided above the ceiling structure. In the event of a fire, selected diffuser means may be replaced by mask assembly which provide fresh, breathable air to an individual. Signal means activated on connection of the mask assembly to the control means, alerts the fireman as to the location where rescue is required.

Abstract: A free jet of air is disturbed at a frequency that substantially matches natural turbulences in the free jet to increase the entrainment, mixing, and spreading of air by the free jet, for example in a room or other enclosure. The disturbances are created by pulsing the flow of air that creates the free jet at the desired frequency. Such pulsing of the flow of air can be accomplished by sequentially occluding and opening a duct that confines and directs the flow of air, such as by rotating a disk on an axis transverse to the flow of air in the duct.

Abstract: Floor vents for alternately supplying air to a conditioned space. Such vents, used in combination with a heating or cooling system, facilitate the delivery of air in a desired direction. The plastic vent may be constructed of pigmented material in a desired color. Louvers with integrally formed gears are pivotally mounted between ends of the vent, and are repositioned by a thumbwheel located below the upper surface of the grille portion of the vent, to thereby avoid damage to the gear by foot traffic above the vent. The louvers are provided with integrally formed bushings and rotatable end elements to enhance rotation and reliability.

Abstract: In an air register comprising a register frame defining an air outlet, a deflector is rested in retracted position and extensible from the frame to a preselected position over the air outlet.

Abstract: A device attachable to a suspended floor member (i) for collecting materials which fall through grid openings in the floor member and (ii) for controlling the rate of airflow through the grid openings in an adjustable manner. The device includes a spill container for positioning under the grid openings of the floor member in a coordinated position such that a venting path is provided for permitting airflow past the spill container from above the floor member while retaining the capacity to collect liquids and particulate matter flowing through the grid openings. Adjustable dampening structure is coupled with the spill member to provide selection of differing vent openings to control rate of airflow through the structure.

Abstract: An air exchange system is disclosed for use in a building having a plurality of stories each having a base floor, finished floor, finished ceiling and rough ceiling. The system comprises a plurality of main distribution ducts each adapted to be located in the space defined between the finished ceiling of a lower story and the finished floor of an upper story lying immediately above the lower story. The main ducts are located on alternate floors and adapted to supply sufficient air for the two adjacent floors. Each of the main ducts are provided with at least one upper duct which communicates with an upper story through the base floor and at least one lower duct which communicates with a lower story through the rough ceiling thereof. A variable air volume control unit is connected to each upper and lower duct controlling the volume of conditioned air entering a story of the building in order to control the temperature within the user space therein.

Abstract: An air distribution register which includes an odorant substance container positioned in a central area beneath the top surface of the register. The odorant container has holes in its bottom, ends and side surfaces for air circulation therethrough. A fragrance producing substance is placed into the container by opening a hinged cover. The application of the desired odor can thus be accomplished separately for each room in the air distribution system.