A system for controlling a multi-zone resistive heater. The system includes a first zone of the multi-zone resistive heater formed from a material having a negative temperature coefficient of resistivity (TCR) and configured to receive a first power to generate thermal energy. The system further includes a second zone of the multi-zone resistive heater formed from the material having the negative TCR, separated from the first zone by a gap, and configured to receive a second power to generate the thermal energy.

A thermal accessory controller comprising an input conduit providing a liquid path for a thermal liquid from the thermal accessory controller to a thermal accessory, an output conduit providing a liquid path for the thermal liquid from the thermal accessory to the thermal accessory controller, a first liquid pump in liquid communication with the input conduit and the output conduit, and a thermal liquid reservoir in liquid communication with the first liquid pump. The thermal accessory controller includes a first liquid block in liquid communication with the first liquid pump, the first liquid block including an internal channel for transferring the thermal liquid, and a second liquid block including an internal channel for transferring a coolant liquid. The thermal accessory controller includes a heating component in liquid communication with the first liquid pump, a cooling component in liquid communication with the second liquid block, and a heat transfer component configured to transfer heat from the first liquid block to the second liquid block.

A thermal accessory controller for controlling the temperature of a thermal accessory. The thermal accessory controller comprises a liquid reservoir for storing a thermal liquid that circulates through the thermal accessory, a temperature control system (TCS) in liquid communication with the liquid reservoir that adjusts the temperature of the thermal liquid according to a TCS target temperature value, and a control unit that controls the temperature control system using the TCS target temperature value. The control unit receives a TCS target temperature, receives a temperature measurement from a temperature sensor, and determines a magnitude of a difference between the TCS target temperature and the temperature measurement. The control unit executes a proportional-integral-differential (PID) algorithm to cause the temperature control system to adjust the temperature of the thermal liquid based on the difference between the TCS target temperature and the temperature measurement.

Various embodiments of smart thermostats are presented herein. A smart thermostat can include a thermostat housing defining a rounded front aperture and having a sidewall. The smart thermostat can include a capacitive touch strip that senses a plurality of gestures. The smart thermostat can include an electronic display. The electronic display may be caused to display icons arranged in a graphical arc. The smart thermostat may include a reflective cover positioned such that the electronic display is viewed through the reflective cover.

A temperature control device (e.g., a thermostat) may be configured to control an internal heat-generating electrical load so as to accurately measure a present temperature in a space around the temperature control device. The temperature control device may comprise a temperature sensing circuit configured to generate a temperature control signal indicating the present temperature in the space, and a control circuit configured to receive the temperature control signal and to control the internal electrical load. The control circuit may be configured to energize the internal electrical load in an awake state and to cause the internal electrical load to consume less power in an idle state. The control circuit may be configured to control the internal electrical load to a first energy level (e.g., a first intensity) during the awake state and to a second energy level (e.g., second intensity) that is less than the first during the idle state.

A building system comprising one or more memory devices storing instructions that, are executed by one or more processors. The instructions include retrieving one or more instructions for installing a thermostat with heating, ventilation, and air conditioning (HVAC) equipment and causing a user interface to display the one or more instructions. The instructions further include receiving one or more confirmation indications of the one or more instructions being performed successfully by a user and causing the user interface to display an interface including one or more indication that the one or more instructions were performed successfully by the user.

An aircraft water supply system supplies water to a water discharge port in an aircraft. A cold water flow path supplies cold water to the water discharge port. A hot water flow path supplies hot water to the water discharge port. A first control valve adjusts the flow rate of cold water flowing through the cold water flow path. A second control valve adjusts the flow rate of hot water flowing through the hot water flow path. A flow sensor detects the flow rate of water at any point up to the water discharge port. A flow control unit controls the opening/closing state of the first control valve and the second control valve based on the water temperature detected by the flow sensor so that the amount of the water discharged from the water discharge port reaches a predetermined target flow rate.

An electric fan powered register booster for a forced air vent in a HVAC system where the booster is configured to stop operation when either of the following events has occurred: 1) the current temperature in the booster has regressed from a recent stored extreme temperature or 2) a predetermined setpoint temperature is between the current temperature and the stored extreme temperature.

The present disclosure includes systems and methods for pre-programming a thermostat such that operational parameters of the thermostat may be selected by an installer during installation based at least in part on a location of the thermostat. For example, a thermostat communicatively coupled to conditioned air equipment may include location determination logic configured to determine a location of the thermostat with respect to a building for which the conditioned air equipment operates. The thermostat also includes conditioned air equipment control logic comprising a plurality of sets of static location-based temperature control algorithms. Each set of the static location-based temperature control algorithms corresponds to a location of the thermostat with respect to the building. The conditioned air equipment control logic is configured to control operation of the conditioned air equipment using a set of the static location-based temperature control algorithms that corresponds to the location determined by the location determination logic.

Various embodiments of smart thermostats are presented herein. A smart thermostat can include a thermostat housing defining a rounded front aperture and having a sidewall. The smart thermostat can include a capacitive touch strip that senses a plurality of gestures. The smart thermostat can include an electronic display. The electronic display may be caused to display icons arranged in a graphical arc. The smart thermostat may include a reflective cover positioned such that the electronic display is viewed through the reflective cover.