Abstract: A diffuser assembly for a heating, ventilating, and air conditioning (HVAC) system includes a housing having an outer frame and an inner frame disposed within the outer frame. The outer frame includes an inlet configured to receive an air flow. The inner frame forms a first flow path for the air flow through the housing between the outer frame and the inner frame. The inner frame defines a second flow path for the air flow through the inner frame. The diffuser assembly also includes a damper assembly configured to transition between a first configuration to enable discharge of the air flow from the housing via the first flow path and a second configuration to enable discharge of the air flow from the housing via the second flow path.

Abstract: A damper of a heating, ventilation, and/or air conditioning (HVAC) system includes a damper blade having a blade body with a hollow portion extending to an end of the blade body. The damper also includes an axle defining an axis about which the damper blade is configured to rotate, where the axle extends from the end of the blade body. The damper also includes a spring thrust bearing having a spring thrust bearing opening through which the axle extends. The spring thrust bearing is configured to support an axial load of the damper blade. The damper also includes an end cap disposed within the hollow portion of the blade body such that the end cap is flush with the end of the blade body.

Abstract: The present disclosure is directed to a sunshade system that monitors a position of the sun and adjusts a position of a frame and/or blades based on a position of the sun. For example, a heating, ventilation, and air conditioning (HVAC) unit of an HVAC system may be exposed to adverse, external weather conditions, such as sunlight, which may heat up components of the HVAC unit and decrease an efficiency of the HVAC system. Accordingly, a control system of the sunshade system may monitor the position of the sun and adjust the position of the frame and/or the blades to provide adequate shading for the HVAC unit.

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 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: The present disclosure is directed to a terminal unit of a heating, ventilation, and/or air conditioning (HVAC) system. The terminal unit includes a control box assembly including an electric enclosure with electronics disposed within a cavity of the electric enclosure. The terminal unit also includes a duct assembly including a casing and a control valve configured to coordinate with the electronic controls to manage air flow through the casing. Further, the terminal unit includes a see-through barrier coupled to the electric enclosure such that the electronics are positioned between a base of the electric disclosure and the see-through barrier.

Abstract: An air handling unit includes a rain hood configured to receive an air flow from an external environment surrounding the rain hood, and a sensor disposed within the rain hood and configured to monitor air flow parameters indicative of a flow rate of the air flow.

Abstract: Embodiments of the present disclosure are directed toward an air diffuser that includes a mounting plate having an opening in a center portion of the mounting plate, where the opening is configured to be coupled to ductwork, a low flow adapter coupled to the mounting plate and disposed over the opening, where the low flow adapter includes extruded nozzles configured to increase a velocity and induction of air flow directed toward an interior space, and where the extruded nozzles are disposed at an angle with respect to a horizontal plane defined by the center portion of the mounting plate, and a diffusion plate coupled to the mounting plate, such that the low flow adapter is positioned between the mounting plate and the diffusion plate.

Abstract: A damper inspection system for a heating, ventilating, and air conditioning (HVAC) system includes a fuse link sensor configured to couple to a damper. The fuse link sensor includes a first contact and a second contact. The fuse link sensor is configured to transition between an engaged configuration in which the first contact is electrically coupled to the second contact and a disengaged configuration in which the first contact is electrically decoupled from the second contact. The damper inspection system includes a remote controller that includes control circuitry configured to electrically couple to the first contact and the second contact and to determine an operational status of a fuse link of the damper based on an electrical continuity between the first contact and the second contact.

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: Systems and methods for integrating a building management system communicatively coupled to a security subsystem via a communication network, in which the building management system determines occupancy data, with a heating, ventilation, and air conditioning subsystem that includes a scrubber unit communicatively coupled to the building management system via the communication network.

Abstract: The present disclosure provides a damper used in heating, ventilation, and air conditioning (HVAC) systems. In an aspect, the damper may include a frame composed of at least two attached frame webs, each frame web comprising a C-shaped component. The damper may further include a damper blade removably attached to each compartment formed by the frame webs.

Abstract: A damper assembly includes a frame having an inner surface and a protrusion extending inwardly relative to the inner surface, a damper blade coupled to the frame and configured to transition between an open position and a closed position, and a latch coupled to the inner surface of the frame. The latch is configured to deform to facilitate transition of the damper blade between the open position and the closed position and to expand to capture and retain the damper blade in the closed position, the latch includes a tab segment configured to move toward the protrusion during deformation of the latch and to move away from the protrusion during expansion of the latch, and a distal end of the tab segment overlaps with a thickness of the protrusion.

Abstract: A louver blade for a louver assembly includes a first section, a second section extending from the first section and including a crest of the louver blade, an extension extending from the second section to form a recess between the extension and the second section, and a protrusion extending from the second section toward the extension and configured to facilitate retention of the particles within the recess. The extension is configured guide particles into the recess in an installed configuration of the louver blade with the louver assembly.

Abstract: An example an adjustable bracket and a 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 plenum slot diffuser includes a plenum box having five walls formed by joining edges of a C-shaped bracket having first, second, and third walls of the five walls with additional edges of an L-shaped bracket having fourth and fifth walls of the fives walls. An air input opening of the plenum box is disposed in one of the five walls and is configured to be coupled to a duct, and an open end of the plenum box defines an air output opening. The plenum slot diffuser includes at least one blade and a blade holding rod comprising a neck, wherein the neck faces away from the air output opening of the plenum box.

Abstract: A diffuser assembly includes a first blade pivotably coupled to a housing and configured to rotate about a first axis and includes second blade pivotably coupled to the housing and configured to rotate about a second axis. The diffuser assembly includes a linkage mechanism coupled to the first blade and the second blade and configured to transition between a first configuration and a second configuration. In the first configuration, the linkage mechanism is configured to induce rotation of the second blade about the second axis in a first direction in response to rotation of the first blade about the first axis in the first direction. In the second configuration, the linkage mechanism is configured to induce rotation of the second blade about the second axis in a second direction, opposite the first direction, in response to rotation of the first blade about the first axis in the first direction.

Abstract: A fan wheel includes a hub having a passage extending along an axis, where the passage is configured to receive a shaft. The hub includes a first mounting surface positioned at a first location along the axis and a second mounting surface offset from the first mounting surface and positioned at a second location along the axis. The fan wheel also includes a fan blade having a first mounting tab and a second mounting tab, where first mounting tab is configured to engage with and couple to the first mounting surface and the second mounting tab is configured to engage with and couple to the second mounting surface.

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 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.