Abstract: A multiple-circuit heating and cooling system includes a first refrigeration circuit having a first condenser and a first evaporator and a second refrigeration circuit having a second condenser and a second evaporator. The first condenser and the second condenser are arranged in a first row split configuration, and the second condenser is downstream of the first condenser relative to a first air flow directed across the second condenser and the first condenser. Additionally, the first evaporator and the second evaporator are arranged in a second row split configuration, and the first evaporator is downstream of the second evaporator relative to a second air flow directed across the first evaporator and the second evaporator.

Abstract: A terminal unit of a heating, ventilation, and/or air conditioning (HVAC) system includes a fan configured to provide an airflow through the HVAC unit by drawing the airflow into a fan inlet and expelling the airflow out of a fan outlet. The terminal unit also includes an inlet diffuser disposed upstream of the fan inlet relative to a direction of the airflow, wherein the inlet diffuser includes a first layer of perforated metal and a second layer of perforated metal disposed between the first layer of perforated metal and the fan inlet.

Abstract: A blower assembly includes a blower shelf having a first support channel. The blower shelf includes a guide bracket coupled to the blower shelf to form a second support channel. A blower housing having a flange is configured to extend into the first support channel and the second support channel. The blower assembly includes a control mounting panel configured to couple to the blower housing and having a tab extending therefrom. The flange of the blower housing is configured to engage with the first support channel and the second support channel during transition of the blower housing along a first direction and into an installed configuration of the blower housing and during transition of the blower housing along a second direction, opposite the first direction, and into an uninstalled configuration of the blower housing. The tab abuts the guide bracket in the installed configuration.

Abstract: A heating, ventilation, and air conditioning (HVAC) system for a building includes a plurality of actuation devices operable to affect one or more variables in the building, a plurality of sensors configured to measure the variables affected by the actuation devices, and a controller. The controller is configured to operate the actuation devices to affect one or more of the measured variables by providing an actuation signal to the actuation devices and to receive sensor response signals from the sensors. The sensor response signals indicate an effect of the actuation signal on the measured variables. For each of the sensor response signals, the controller is configured to calculate a similarity metric indicating a similarity between the sensor response signal and the actuation signal. The controller is configured to automatically establish a device pairing including one of the actuation devices and one of the sensors based on the similarity metrics.

Abstract: A mobile sensor for a building includes a sensor, and a wireless transceiver. The sensor is configured to measure an indoor air quality parameter in an air sample at a current location of the mobile sensor as the mobile sensor transports through the building. The wireless transceiver is configured to transmit the measurement of the indoor air quality parameter and an indication of the current location of the mobile sensor to a building controller.

Abstract: A building management system includes building equipment operable to affect a physical state of a building. The building management system includes a system manager coupled to the building equipment via a system bus, the system manager comprising a schedule manager configured to control an operation schedule of the building equipment. A client device is configured to communicate with the schedule manager to modify operation schedules of the building equipment or add new operation schedules for the building equipment. The schedule manager comprises a list of available schedules for the building equipment and is configured to, in response to modification of the operation schedules or addition of new operation schedules, update the list of available schedules to include the modification or the new operation schedule.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a refrigerant circuit configured to circulate a refrigerant to condition an air flow within an air flow conduit and a reheat system fluidly separate from the refrigerant circuit, wherein the reheat system is configured to utilize a waste fluid from a waste heat source to reheat the air flow conditioned by the refrigerant circuit.

Abstract: A method for providing filtered air to a zone of a building includes operating an air handler to pass unfiltered air through a filter and output filtered air to the zone of the building. The method includes determining an amount of filtered air provided to the zone of the building by the air handler. The method includes determining if additional air filtration is required to satisfy at least one of a desired amount of clean airflow or a desired reduction of a risk of infection. The method includes activating an in-zone filtration device and operating the in-zone filtration device to draw air from the zone into an inner volume, filter the air, and recirculate the filtered air to the zone of the building in response to determining additional air filtration is required.

Abstract: A lifting lug for a heating, ventilation, and/or air conditioning (HVAC) unit includes a first flange configured to be secured against a surface of the HVAC unit, a second flange configured to be secured against the surface of the HVAC unit, and an intermediate portion extending between the first flange and the second flange. The intermediate portion is offset from the first flange and the second flange to form a space between the intermediate portion and the surface of the HVAC unit in an installed configuration of the lifting lug, and the intermediate portion includes an edge and a notch formed in the edge and through a thickness of the intermediate portion.

Abstract: Systems and methods for automatically commissioning and operating a heating, ventilation, or air conditioning (HVAC) system for a building site are provided. An exemplary method includes constructing a model using physical equipment of the HVAC system and relationships between the physical equipment. The model indicates connections between the physical equipment and one or more resources produced or consumed by the physical equipment. The method includes generating a mapping between points of the physical equipment at the building site and corresponding variables of the model, using the model to generate values of one or more control variables of the model, and operating the physical equipment by providing the values of the control variables to corresponding points of the physical equipment based on the mapping.

Abstract: A method of ranking recommendations comprising receiving a recommendation to improve space utilization of a space, retrieving context data associated with the space, the context data including data describing previous user interest in other recommendations related to the recommendation and at least one of: data describing a current space utilization for the space, data describing a number of recommendations that are associated with the space, data describing environmental preferences of first individuals associated with the space or a building including the space, or data describing an organizational grouping of second individuals associated with the space or the building, calculating a score for the recommendation based on the previous user interest and the at least one of: the current space utilization, the number of recommendations, the environmental preferences, or the organizational grouping, and performing an action based on the score using at least one of the score or the recommendation.

Abstract: A building management system (BMS) operates a plurality of HVAC devices to affect a physical state or condition and detects a fault condition at a second HVAC device affected by the physical state or condition and having causal relationships with the plurality of HVAC devices such that faulty operation of one or more of the plurality of HVAC devices causes a detectable effect at the second HVAC device. The BMS identifies, based on the fault condition, a predetermined set of system parameters corresponding to the fault condition and comprising a plurality of system parameters of the plurality of HVAC devices that are potential causes of the fault condition. The BMS retrieves operating data for the predetermined set of system parameters and transmits a signal to display a user interface comprising the operating data on a display screen.

Abstract: A method of operating a building management system is disclosed. The method includes determining, by a processing circuit, policy rankings for a plurality of control policies based on building operation data of a first previous time period, selecting, by the processing circuit, a set of control policies from among the plurality of control policies based on the policy rankings of the set of control policies satisfying a ranking threshold, generating, by the processing circuit, a plurality of prediction models for the set of control policies, selecting, by the processing circuit, a first prediction model of the plurality of prediction models based on building operation data of a second previous time period, and responsive to selecting the first prediction model, operating, by the processing circuit, the building management system using the first prediction model.

Abstract: A building network system of a building includes a network system. The network system includes one or more processing circuits. The one or more processing circuits are configured to receive network data from a building network of the building, the network data associated with a plurality of pieces of building equipment of the building. The one or more processing circuits are configured to generate a digital network twin of the building network based on the network data, the digital network twin representing the plurality of pieces of building equipment and relationships between the plurality of pieces of building equipment. The one or more processing circuits are configured to identify one or more network updates to the building network based on the digital network twin. The one or more processing circuits are configured to deploy the one or more network updates to the building network.

Abstract: The present disclosure relates to a thermostat including a control base configured to couple with and support a portable thermostat, wherein the control base is configured to determine a measure of an environmental condition of a local environment of the control base and communication circuitry of the control base configured to communicate the measure to facilitate control of an HVAC system.

Abstract: A control system for a heating, ventilation, and/or air conditioning (HVAC) system includes a controller. The controller is configured to control the HVAC system to condition an air flow based on first feedback from a first sensor of the HVAC system, receive second feedback from a second sensor of the HVAC system, and control the HVAC system to condition the air flow based on the second feedback instead of the first feedback when the first feedback from the first sensor being no longer available. The first feedback is indicative of a first operating parameter of the HVAC system, and the second feedback is indicative of a second operating parameter of a refrigerant flowing through the HVAC system.

Abstract: A building management system includes a communications bus, and devices coupled to the communications bus. The devices are coupled to the communications bus and configured to communicate on the communications bus using a master-slave token passing protocol. A first one of the devices has an active node table stored therein. The active node table includes multiple nodes. Each node represents one of the devices participating in a token passing ring used to exchange information among the devices via the communications bus using the master-slave token passing protocol. The first device is configured to monitor the active node table for new nodes and to identify a new device communicating on the communications bus in response to a determination that the active node table includes a new node.

Abstract: A controller for heating, ventilation, or air conditioning (HVAC) equipment includes a communications interface configured to communicate with first HVAC equipment and second HVAC equipment and a processing circuit communicably coupled to the communications interface. The processing circuit is configured to detect a staging event for the first HVAC equipment occurring at a first time, obtain a delay time based on an estimated amount of time required to reach steady state after the staging event for the first HVAC equipment occurs at the first time, determine whether the delay time has elapsed since the staging event for the first HVAC equipment has occurred, and prevent the second HVAC equipment from staging in response to a determination that the delay time has not elapsed since the staging event for the first HVAC equipment has occurred.

Abstract: A building security system of a building including one or more memory devices configured to store instructions causing one or more processors to receive door lock data collected from one or more sensors for one or more doors within the building indicating operation of the one or more doors, select a period for which the door lock data was collected, select a first door from the one or more doors of the building for which data is collected, and identify segments of the data indicating activity of the door. The instructions also apply a model to segments of the data indicating activity of the first door, compute a probability metric for each segment of the data, compute a combined probability score for the first door based on the computed probability metrics, and classify the first door as normally functioning or malfunctioning by comparing the combined probability score to a threshold.