Embodiments determine the effect of an environmental maintenance device on other environmental maintenance devices in environmentally controlled space. The determined effects may be modeled and graphically represented using, for example, an effectiveness map. In the case of a data center, an exemplary effectiveness map may illustrate the effect that one or more computer room air conditioners (CRACs) have on themselves and on other CRACs in the data center. In the case of an office building, an exemplary effectiveness map may illustrate the effect that one or more selected variable air volume (VAV) terminal units have on their own thermostat readings and the thermostat readings of other VAV terminal units in the office building.

Methods and systems for configuring a modular building control system. An illustrative method may include entering a configuration mode in a base module and in each of the expansion modules. While in the configuration mode, the base module may collect information from each of the expansion modules. A system configuration may be created for the modular building control system based at least in part on the collected information and includes configuration parameters for the base module and each of the expansion modules. The base module may transmit to each of the expansion modules their respective configuration parameters. The base module and each of the expansion modules may install their respective configuration parameters, exit the configuration mode, and enter an operation mode. While in the operation mode, the base module and each of the expansion modules may control the modular building control system.

Methods and systems for controlling a building. An illustrative method includes receiving sensor data from one or more sensors of the building, using the received sensor data to control one or more building management components to control one or more environmental conditions within the building, normalizing the sensor data and storing the normalized sensor data, comparing the normalized sensor data with normalized sensor data from one or more other buildings to identify one or more anomalies associated the building, and providing a recommended action to improve at least one of the one or more identified anomalies of the building.

Disclosed is a heating device, including a first and second ends of an indoor water supply pipe communicated with a main water supply pipe and a water supply end of a radiator; a valve, a first temperature sensor, a heating and control module and a third temperature sensor arranged between the first and second ends; two ends of the heating and control module connected with a bypass pipe; a first and second ends of an indoor return water pipe communicated with a main return water pipe and a return water end of the radiator; a three-way valve and a second temperature sensor arranged between the first end and the second end of the indoor return water pipe; and a first and second ends of the water pump communicated with a third end of the three-way valve and the indoor water supply pipe.

A building control system includes a building controller and a user interface device operatively coupled to the building controller. The building controller is wall mountable and includes a plurality of ports for controlling one or more points that are associated with one or more plants of a building. The building controller controls the one or more points in accordance with one or more programmable point control values that are associated with one or more points. The user interface device provides a user interface for operating the building controller and is configured to display a plurality of menu screens on a display that allow a user to view one or more of the points, change the programmable control value for one or more of the points, and view one or more alarms generated by the building controller for one or more of the points.

An air conditioner unit includes a variable speed compressor for circulating refrigerant through refrigeration loop and a controller configured to initiate an operating cycle, start a compressor transition timer, and determine an unfiltered compressor speed. The unfiltered compressor speed is fixed based on the selected operating mode until the compressor transition timer reaches a predetermined transition delay time, after which the unfiltered compressor speed is determined using a closed loop feedback control algorithm. The controller is further configured to operating the variable speed compressor at a target compressor speed that is modified from the unfiltered compressor speed based on the identification of a speed modification condition, such as a dehumidification deficiency a speed restriction, or the identification of one or more resonance avoidance zones.

A method/structure for calibrating a product fluid flow device having one or more apertures with aggregate area A.sub.o, where fluid flows along a fluid flow path therethrough in response to pressure differentials ΔP across the apertures. Calibration is effected relative to a calibration fluid flow device having a geometry and operational parameters corresponding to those of the product fluid flow device. A piecewise curved calibration controller establishes calibration conditions and generates a discrete point calibration flow rate (dpCFR) Function by measuring at a sparse set of points in a range of interest and determining a piecewise curved mathematical representation of fluid flow through the calibration fluid flow device. Data representative of the CFR function is transferred to a product blade controller, which processes the mathematical representation, and controls fluid flow through product fluid flow device based on values extracted from the received dpCFR Function.

Systems and methods for characterization of retrofit opportunities are described. Some embodiments are directed to methods for determining the air leakage rate of a building, and accordingly, for determining suitability of sealing of air leaks to improve the energy efficiency of a building. The methods may comprise computing, using at least one computing device disposed remote from a building and based at least in part on heating, ventilation and air conditioning (HVAC) runtime data associated with the building, one or more thermal characteristics of the building. The HVAC runtime data may be computed based on data received from a thermostat or a meter, such as an electric or a gas meter. To isolate the impact of air leakage, subsets of the HVAC runtime data at time intervals selected to have substantially the same conditions, but different wind speeds, may be computed.

A building management system (BMS) provides feedback to a user via a user interface to assist the user in configuring the BMS. It can be challenging for new or less experienced users to understand all of the actions they are performing when configuring a BMS. The feedback presented via the user interface includes graphical and textual feedback to alert the user of actions performed when applying tags. The feedback identifies one or more missing requirements associated with the tags. The feedback presented via the user interface also includes textual summaries of control sequences configured using the BMS. The textual summaries include descriptions of control sequences and instructions for properly configuring the building equipment.

A thermostat for a building zone includes at least one of a model predictive controller and an equipment controller. The model predictive controller is configured to obtain a cost function that accounts for a cost of operating HVAC equipment during each of a plurality of time steps, use a predictive model to predict a temperature of the building zone during each of the plurality of time steps, and generate temperature setpoints for the building zone for each of the plurality of time steps by optimizing the cost function subject to a constraint on the predicted temperature. The equipment controller is configured to receive the temperature setpoints generated by the model predictive controller and drive the temperature of the building zone toward the temperature setpoints during each of the plurality of time steps by operating the HVAC equipment to provide heating or cooling to the building zone.