Controller technology, in which data specifying a user preference relating to an environmental parameter for a property is received. Based on data collected by a monitoring system, a location of one or more users within the property is identified. Environmental condition data for the property is accessed, the environmental condition data including environmental condition data for the location of the users within the property and other unoccupied locations within the property. The environmental condition data for the property is analyzed with respect to the preference relating to the environmental parameter for the property. Based on the analysis of the environmental condition data for the property with respect to the preference relating to the environmental parameter for the property, a setting for at least one component of an HVAC system is determined. The at least one component of the HVAC system is controlled according to the determined setting.

Provided herein are embodiments of, a multistage gas furnace, a controller therefor and a computer-usable medium having non-transitory computer readable instructions stored thereon for execution by a processor to perform a method for operating a gas furnace. In one embodiment, the gas furnace includes: (1) a burner, (2) a circulation fan and (3) a furnace controller. The furnace controller having: (3A) an interface configured to receive heating calls and a blower control signal, the blower control signal corresponding to an operating speed of the circulation fan and (3B) a processor configured to respond to the heating calls and the blower control signal by setting and adjusting a gas input rate for the burner that is based on the blower control signal and that corresponds to a discharge air temperature determined by a dedicated discharge air sensor associated with the furnace.

Occupancy detection is an increasingly important part of building control logic, as new systems and control logic greatly benefit from human-in-the-loop sensing. Current approaches such as CO.sub.2 monitoring, acoustic detection, and PIR based motion detection are limited in scope, as these variables are a proxy for occupancy, and at best can be roughly correlated to occupancy, and cannot reliably provide a count of the number of occupants. The disclosed sensor uses thermal information that is continually being emitted by human occupants and optical processing to count and spatially resolve the location of occupants in a room, allowing ventilation flow rates to be properly controlled and directed, if enabled. Occupant detection and counting cheaply and reliably without moving parts is the holy grail of building controls at the moment, which are the basic design principles behind the disclosed inexpensive, static, and stable thermographic occupancy detection sensor.

Disclosed is a system to control a climate of a space via a first control loop and a second control loop interacting with the first control loop. The system includes a first controller of the first control loop to generate a first control signal based on a first modified set point and a first feedback signal. The system further includes a second controller of the second control loop to generate a second control signal based on a second modified set point and a second feedback signal. The system further includes a decoupler configured to predict a first effect of the first control signal on the second control loop and a second effect of the second control signal on the first control loop, and generate the first modified set point and the second modified set point to reduce the first effect and the second effect.

According to certain embodiments, a thermostat is configured for use in a climate control system. The thermostat is operable to use two-way communication for communicating operational information between the thermostat and at least one rooftop unit (RTU) within the climate control system. For example, the two-way communication comprises sending first operational information to the RTU and receiving second operational information from the RTU. The operational information comprising one or more climate control commands, setpoints, configuration information, diagnostics, and/or sensor data. The thermostat is further operable to operate the climate control system based on the operational information communicated between the thermostat and the RTU.

A method for controlling a variable refrigerant flow (VRF) system includes applying a time window to sensor data associated with the VRF system, the sensor data including input data points and having a first resolution, wherein applying the time window to the sensor data isolates a subset of the input data points; applying a timing weight to one or more input data points in the subset of the input data points to generate corrected data points having a second resolution higher than the first resolution; creating a virtual sensor and mapping the corrected data points to an output of the virtual sensor; and controlling the VRF system based on an output of the virtual sensor. The use of virtual sensors with a higher resolution than corresponding physical sensors in this manner allows for existing physical sensors to be used while improving performance of the VRF system.

A system, method and computer program product for operating a low-voltage Internet-of-Things sensor device. The method includes sensing of the temperature dependence at each voltage condition in addition to the actual temperature and voltage. A programmed machine learning model uses the information to decide when it is appropriate to test the device functionality and use the results of different tests to determine when the system should run synchronously or asynchronously through a machine learning predictive algorithm. Based on said one or more sensed operating conditions, the system uses the model to detect a mode of operation of said IoT device indicating IoT device meets an expected level of performance, or a mode indicating said IoT device is not operating according to the expected level of performance. Based on the detected operating condition, the IoT device automatically adapts its operation to ensure a desired level of IoT sensor device performance.

A heating, ventilation, or air conditioning (HVAC) system for a building includes airside HVAC equipment configured to provide heating or cooling to one or more building spaces and one or more controllers. The one or more controllers are configured to generate airside energy targets for the one or more building spaces using a heat transfer model that defines a relationship between the airside energy targets, a temperature of the one or more building spaces, and a thermal capacitance of the one or more building spaces. The one or more controllers are configured to control the airside HVAC equipment in accordance with the airside energy targets.

A wafer processing apparatus is provided. The apparatus includes: a heating plate through which vacuum ports are formed; a plurality of temperature sensors; a heating device configured to heat the heating plate; first and second power supplies; temperature controllers to generate first and second feedback temperature control signals for controlling power output power supplies based on measurement values generated by the temperature sensors; an electronic pressure regulator configured to provide vacuum pressure for fixing a wafer to the plurality of vacuum ports; and a wafer chucking controller configured to control the electronic pressure regulator, and generate a feedback pressure control signal for controlling the electronic pressure regulator based on the first and second feedback temperature control signals.

A method implemented in a computer infrastructure having computer executable code tangibly embodied on a computer readable medium being operable to perform a thermal analysis of a data center and overlay the thermal analysis on a map of the data center to provide an overlaid thermal analysis. Additionally, the computer executable code is operable to dynamically control at least one partition in the data center based on the overlaid thermal analysis.