A user interface for a thermostat that controls a radiator valve can include a user input member that is movable from a home position to a set point increase or decrease position to increase or decrease a set point temperature of the thermostat. In some embodiments, a return mechanism returns the user input member to the home position after being released from one of the set point increase and decrease positions. The user interface can include an indicator panel and controller that controls the indicator panel to provide an indication of when the set point temperature of the thermostat is being adjusted. The user interface can also include a lockout controller that prevents further set point temperature adjustments using the user interface when the set point temperature differs from the environmental temperature by a specified amount.

A heating fluid control system determines the aggregated demand for heating fluid from a plurality of sources of demand in a building and deactivates a boiler that provides the heating fluid when the aggregated demand is zero. The sources of demand can include radiators and domestic hot water fixtures. Valves that control the flow of heating fluid from the boiler to these sources of demand can transmit signals representative of the position of the valve. A controller can use these signals and other signals to determine the demand for heating fluid from each source of demand. The controller evaluates the signals to determine the aggregate system demand. And after deactivating the boiler, the controller can reactivate the boiler when the aggregate system demand is determined to be non-zero. Methods of using such heating systems are also disclosed.

A user interface for a thermostat that controls a radiator valve can include a user input member that is movable from a home position to a set point increase or decrease position to increase or decrease a set point temperature of the thermostat. In some embodiments, a return mechanism returns the user input member to the home position after being released from one of the set point increase and decrease positions. The user interface can include an indicator panel and controller that controls the indicator panel to provide an indication of when the set point temperature of the thermostat is being adjusted. The user interface can also include a lockout controller that prevents further set point temperature adjustments using the user interface when the set point temperature differs from the environmental temperature by a specified amount.

A user interface for a thermostat that controls a radiator valve can include a user input member that is movable from a home position to a set point increase or decrease position to increase or decrease a set point temperature of the thermostat. In some embodiments, a return mechanism returns the user input member to the home position after being released from one of the set point increase and decrease positions. The user interface can include an indicator panel and controller that controls the indicator panel to provide an indication of when the set point temperature of the thermostat is being adjusted. The user interface can also include a lockout controller that prevents further set point temperature adjustments using the user interface when the set point temperature differs from the environmental temperature by a specified amount.

A heating system includes a heat source. A controller is connected to the heat source and controls operation of the heat source. A first sensor is configured to sense temperature and report a signal to the controller. An input/output (I/O) device is configured to send a set point to the controller. The controller selectively operates the heat source based on a comparison of the signal and the set point. The heat source communicates wirelessly with at least one of the controller, the first sensor, and the I/O device.

A method includes obtaining gas consumption data for a heat source that is heating a structure, obtaining zone and ambient temperature data while the structure is being heated, and estimating unknown parameters of elements of a dynamic heat loss model as part of a model predictive control (MPC) model for the structure using inverse modeling as a function of the obtained gas consumption data and zone and ambient data.

A furnace for a heating, ventilation, and air conditioning (HVAC) system, comprises a burner configured to ignite a mixture of air and fuel and a sensor configured to detect a parameter indicative of an intensity of sound generated by the furnace and configured to transmit a signal indicative of a value of the parameter. The furnace further comprises a controller configured to receive the signal indicative of the value of the parameter, compare the value of the parameter to a threshold value, and in response to a determination that the value of the parameter meets or exceeds the threshold value, control operation of the furnace to adjust a flow rate of the air, a flow rate of the fuel, or both.

A user interface for a thermostat that controls a radiator valve can include a user input member that is movable from a home position to a set point increase or decrease position to increase or decrease a set point temperature of the thermostat. In some embodiments, a return mechanism returns the user input member to the home position after being released from one of the set point increase and decrease positions. The user interface can include an indicator panel and controller that controls the indicator panel to provide an indication of when the set point temperature of the thermostat is being adjusted. The user interface can also include a lockout controller that prevents further set point temperature adjustments using the user interface when the set point temperature differs from the environmental temperature by a specified amount.

A heating fluid control system determines the aggregated demand for heating fluid from a plurality of sources of demand in a building and deactivates a boiler that provides the heating fluid when the aggregated demand is zero. The sources of demand can include radiators and domestic hot water fixtures. Valves that control the flow of heating fluid from the boiler to these sources of demand can transmit signals representative of the position of the valve. A controller can use these signals and other signals to determine the demand for heating fluid from each source of demand. The controller evaluates the signals to determine the aggregate system demand. And after deactivating the boiler, the controller can reactivate the boiler when the aggregate system demand is determined to be non-zero. Methods of using such heating systems are also disclosed.

One or more systems, devices, and techniques for heating a structure using boiler water stored by a boiler are described herein. For example, a method includes obtaining gas consumption data for a heat source that is heating a structure and obtaining zone and ambient temperature data while the structure is being heated. Additionally, the method includes estimating unknown parameters of elements of a dynamic heat loss model as part of a model predictive control (MPC) model for the structure using inverse modeling as a function of the obtained gas consumption data and zone and ambient data.