A highly versatile control system which is able to control devices in a linked manner is provided. The control system is configured to condition air of a single space 9, and includes: an air conditioner 2 and a floor heating apparatus 3 which cannot directly communicate with each other; a router 4 which is able to communicate with the air conditioner 2 and the floor heating apparatus 3 via communication lines 11 and 12; and a terminal device 5 which is connectable to the Internet 10 and is able to communicate with the router 4 via a communication line 13. The air conditioner 2 and the floor heating apparatus 3 are controlled in a linked manner by a control signal sent from the terminal device 5 via the router 4.

A method for controlling an on-demand high volume capable fluid heating system that supplies a total heating power at a turndown ratio and a total flowrate of a fluid supply, the fluid heating system comprising a plurality of heat exchangers fluidly connected in parallel, each of the plurality of heat exchangers comprising: a fluid conductor, wherein each of the plurality of heat exchangers contributes to the total heating power and a portion of the total flowrate of the fluid supply through the fluid conductor; an inlet conductor configured to connect the fluid supply to the plurality of heat exchangers; an outlet conductor configured for receiving the fluid supply downstream of the plurality of heat exchangers; an auxiliary conductor connecting the inlet conductor at a first location and the outlet conductor, the auxiliary conductor comprising a modulating valve; and a pump disposed downstream from the first location on the inlet conductor.

An illustrative example embodiment of a method of operating a furnace configured for heating a space to be occupied by at least one individual includes determining a rate of change of a flue gas temperature of a flue gas vented from the furnace, determining a difference between the determined rate of change and a predetermined acceptable rate for a current furnace operating condition, and adjusting at least one operation characteristic of the furnace based on the determined difference satisfying at least one predetermined criterion. In some situations, such as a heating cycle, the flue gas temperature is compared to maximum and minimum thresholds.

A water heater and methods of operating the water heater are provided. The water heater appliance includes a tank, a cold water inlet conduit extending into the tank, a heating element within the tank, a hot water conduit extending from the tank to a mixing valve, a mixed water conduit downstream of the mixing valve, and a user interface. The method includes and/or the water heater is operable for receiving, from the user interface, a user value for a tank temperature setpoint. An upstream water heater is detected and a capacity thereof is predicted. The tank temperature setpoint is then adjusted based on the predicted capacity of the upstream water heater.

In a split system heat pump cooling and heating system, an auxiliary hot water storage tank is provided as an energy storage bank. Two sets of coils run through this storage tank, a first set carrying hot refrigerant from the heat pump to deposit energy and a second set carrying hot potable water to remove energy. Valve and switch matrixes are operated at the heat pump to provide hot potable water from the energy storage bank during both normal space heating and cooling operations of the heat pump.

A free-standing Energy Recovery System enables sanitary recovery of thermal energy with heat transfer from hot waste effluent to incoming domestic water. The source of the effluent may, for example, be conventional commercial ware-washing, clothes washing equipment, pasteurization and other industrial processes.

A combination boiler provides heated water to a boiler loop and domestic hot water (DHW) to a domestic water loop. The combination boiler includes a primary heat exchanger (PHE) connected to the boiler loop and a burner to provide heat to the primary heat exchanger. A secondary heat exchanger (SHE) transfers heat energy from the boiler loop to the domestic water loop. A controller monitors a PHE inlet temperature and a DHW output temperature, obtains a pre-heat initialization temperature threshold and a pre-heat cancellation temperature threshold, and detects a low temperature condition. A pre-heat operation is initiated responsive to the low temperature condition by circulating heated water from the PHE to the SHE. The burner is selectively fired at least in part according to an outlet temperature of the PHE.

The invention relates to a method for operating a circulation system comprising a cooling device with an input port and an output port for cooling water. The invention also relates to a circulation system for implementing said method.

The present invention relates to a system that allows the temperature of water inlet and outlet tubes in a water cylinder to be measured, making it possible to estimate the energy stored in the device and to estimate the times when the hot water is being used, in addition to allowing user behaviour to be predicted, anomalies in the hot water to be detected, and the power consumption of the device to be optimised. The device comprises: a water cylinder controller (100) disposed on the case; two thermocouple cables (300) for measuring the water inlet and outlet temperature in the cylinder; and an antenna (200) coupled to an antenna connector (12) in order to connect the controller (100) to another server or to the cloud, where the information is processed.

The present invention relates to a system that allows the temperature of water inlet and outlet tubes in a water cylinder to be measured, making it possible to estimate the energy stored in the device and to estimate the times when the hot water is being used, in addition to allowing user behaviour to be predicted, anomalies in the hot water to be detected, and the power consumption of the device to be optimised. The device comprises: a water cylinder controller (100) disposed on the case; two thermocouple cables (300) for measuring the water inlet and outlet temperature in the cylinder; and an antenna (200) coupled to an antenna connector (12) in order to connect the controller (100) to another server or to the cloud, where the information is processed.