Abstract: An air diffuser configured to be positioned in a raised floor, in which the air diffuser includes a sleeve having a first end and a second end with an air flow passage extending through the sleeve from the first end to the second end, a diffuser face disposed at the first end of the sleeve and configured to be exposed to an environment in an installed position within the raised floor, a damper disposed at the second end of the sleeve, and a plenum chamber defined within the sleeve between the damper and the diffuser face.

Abstract: A device comprising a fin structure, a vent disposed in the fin structure, a cooling coil disposed in the vent, a light disposed in the fin structure and wherein the fin structure is configured to create a Coanda effect for air exiting the vent.

Abstract: Described is a louver having a frame that forms an enclosure defining an opening, and a plurality of louver blades disposed within the opening. Each of the plurality of louver blades include a catch member that longitudinally extends between a first blade end and a second blade end of a corresponding louver blade. The louver may also include a rotation assembly configured to rotatably couple with the plurality of louver blades and the frame. The plurality of louver blades may autonomously rotate about rotation members of the rotation assembly based on environmental elements captured in the catch member such that the plurality of louver blades are configured in an open position in response to no water in the catch member and are configured in a closed position in response to an amount of environmental elements in the catch member.

Abstract: A base system for a heating, ventilation, and air conditioning (HVAC) system includes a frame configured to support a housing of the HVAC system, where the frame includes a base rail configured to define a portion of a perimeter of the frame. The base rail includes a base segment configured to be disposed on a curb in an installed configuration of the HVAC system, an external wall extending from the base segment, a top segment extending from the external wall, an internal wall extending from the top segment, and a recessed flange extending from the internal wall and away from the external wall.

Abstract: The present application discloses an impeller for a centrifugal fan and a centrifugal fan. The impeller comprises a support member and several vanes. The support member has an inner wall that defines a hollow portion. The several vanes are arranged inside the hollow portion, each of the several vanes is connected with the inner wall and extends along the axial direction of the support member, and the several vanes are arranged along the circumferential direction of the support member. Each of the several vanes is bent and comprises a front edge, a tail edge, a convex suction surface, and a concave pressure surface, the suction surface and the pressure surface are arranged to oppose each other, and the front edge and the tail edge are arranged to oppose each other, wherein the tail edge is connected with the inner wall of the support member, and wherein several protrusions are provided on the suction surface, and the several protrusions are arranged to be close to the front edge.

Abstract: A louver assembly includes a support, a plurality of blades, and an insert. The support extends along a length and includes a plurality of slots formed therethrough. Additionally, each louver blade of the plurality of louver blades includes a retention aperture formed therethrough, where each louver blade of the plurality of louver blades extends through a respective blade aperture of the plurality of blade apertures. Moreover, the insert extends through the retention aperture of each louver blade of the plurality of louver blades.

Abstract: An exhaust fan unit of a heating, ventilation, and/or air conditioning (HVAC) system includes an outer fluid path of a nozzle assembly of the exhaust fan unit defined by and between an outer wall of the nozzle assembly and an inner wall of the nozzle assembly, an inner fluid path of the nozzle assembly defined by and radially inward from the inner wall, and a plurality of entrainment ports extending from the outer wall to the inner wall and configured to enable environmental air to pass to the inner fluid path, where each entrainment port includes a bottom surface that tapers downwardly from the inner wall to the outer wall.

Abstract: A firestat for providing an output for controlling an opening and closing of a fire/smoke damper. The firestat includes a fire/smoke damper test switch and an actuator configured to depress the fire/smoke damper test switch. The firestat is further configured to release the fire/smoke damper test switch in response to a depressing force applied to the actuator, wherein melting or other damage to the actuator causes a release of the test switch.

Abstract: A cam assembly for selectively contacting an end-of-stroke damper position switch. The cam assembly includes a first cam that is rotatable about a first axis, and a position lever that is connected to and rotates with the cam assembly. The position lever is configured to be connected to an opening and closing mechanism of the damper and the cam assembly is adjustable to contact a first end-of-stroke damper position switch at the end-of-stroke of the opening and closing mechanism of the damper regardless of the position of the lever.

Abstract: An example an adjustable bracket and an damper system usable with the adjustable bracket assembly for transmitting an actuation force from an actuator to a plurality of damper assemblies. The adjustable bracket assembly may include a shaft extending along and configured to rotate about a first axis in response to an output from the actuator, a first output lever configured to transmit a rotational force of the shaft to a first damper assembly, and a second output lever configured to transmit the rotational force of the shaft to a second damper assembly.

Abstract: A linear bar diffuser includes a grille frame and blades in a stacked arrangement within the grille frame such that space is provided between adjacent blades to facilitate flow of an incoming air flow therethrough. One of the blades includes a leading edge configured to face the incoming air flow, the leading edge including an undulated contour extending along a length of the blade and into a width of the blade, the width of the blade extending transverse to the length and between the leading edge and a trailing edge of the blade.

Abstract: A plenum slot diffuser is configured to receive an air flow and includes a blade configured to guide the air flow toward a space to condition the space. The blade includes a length along which a leading edge of the blade extends, where the leading edge is configured to face an air flow. The blade also includes a width extending transverse to the length between the leading edge and a trailing edge of the blade, and including a curved profile extending along a majority of the width. The blade also includes an undulated contour extending along the leading edge and into and out of the width.

Abstract: A round or rectangular ceiling diffuser includes a blade. The blade includes a leading edge configured to face an incoming air flow and having an undulated contour extending along a closed-loop formed by the blade. The blade also includes a trailing edge opposite to the leading edge, where a width of the blade extends from the leading edge to the trailing edge and the undulated contour extends into and out of the width.

Abstract: An air diffuser of a heating, ventilation, and/or air conditioning (HVAC) system includes a mixing chamber having a circulation inlet and a mixing region, a room air intake fluidly coupled with the circulation inlet and separated from the mixing region by a blank-off plate, and a nozzle. The nozzle is disposed adjacent to the circulation inlet and configured to accelerate a conditioned air flow into the mixing region such that unconditioned room air is induced by the conditioned air flow to enter the mixing region through the circulation inlet and from the room air intake.

Abstract: A damper system includes a damper housing configured to flow air, a damper blade disposed in the damper housing and having an orifice, the damper blade being rotatable in the damper housing between a closed position and an open position. The orifice is configured to allow air to flow through the damper blade while the damper blade is in the closed position. An auto-balancing damper is disposed in the damper housing apart from the damper blade, and the auto-balancing damper is configured to regulate a flow of the air through the damper housing.

Abstract: A contaminant scrubber of a heating, ventilation, and air conditioning (HVAC) system includes a sorption cavity, a sorption inlet damper configured to receive return air from a conditioned space and into the sorption cavity, and a sorption outlet damper configured to output the return air from the sorption cavity and toward the conditioned space. The contaminant scrubber also includes an outer housing about the sorption cavity, the outer housing having a mount-facing side wall along which the sorption inlet damper and the sorption outlet damper are disposed.

Abstract: Embodiments of the present disclosure relate to an air handling unit having a housing that defines an air flow path therethrough, a heat exchanger disposed within the air flow path and configured to flow a working fluid therethrough, and a nozzle configured to deliver a fire suppression agent into the air flow path.

Abstract: A nozzle assembly for a fan unit includes an inner nozzle having a tapered outer diameter and a flow path radially inward from the tapered outer diameter with respect to a longitudinal axis of the nozzle assembly. The flow path is configured to guide a fluid flow and to expel the fluid flow through an inner outlet of the inner nozzle to a surrounding environment. The nozzle assembly also includes an outer nozzle disposed radially outward from the inner nozzle with respect to the longitudinal axis. The outer nozzle and the tapered outer diameter of the inner nozzle define an annular flow path therebetween. The annular flow path is configured to guide the fluid flow and to expel the fluid flow to the surrounding environment through an outer outlet of the outer nozzle. A cross-sectional area of the outer outlet is adjustable via movement of the inner nozzle, the outer nozzle, or both along the longitudinal axis of the nozzle assembly.

Abstract: A resetting element for transmitting resetting force to a thermal switch. The resetting element includes a first end and an elastic element configured to transmit a force received at the first end to the reset switch of the thermal switch, wherein the elastic element is prevents damage to the thermal switch by decreasing the force transmitted to the reset switch from the first end.