A system and method for climate control of an environment in a building are provided. The system includes a first loop and second loop for circulating a heating medium. The system also includes a boiler, an energy optimizer and a controller. The method involves circulating a heating medium, providing heat to the heating medium, and controlling the boiler based on various inputs.

A device, system, and a method are provided for notifying a user to replace a sacrificial anode in a pool or spa system. The device is provided in the form of a body defining a cavity, a sacrificial anode, and a sensor. The sacrificial anode substantially surrounds the cavity when the sacrificial anode is coupled to the body. The sensor is at least partially received into the cavity and is in communication with a pool automation system. The sensor is designed to transmit a signal to the pool automation system when the sensor detects water within the cavity. The signal is processed by the pool automation system, and the pool automation system may then transmit a notification to a user that the sacrificial anode is depleted.

Disclosed is a storage water heating system with a heating apparatus external to the storage tank. The external apparatus receives a liquid coming from a lower portion of the tank, heats it, and delivers it to a top portion of the tank, where the hot water outlet is located. In this way, the natural thermocline of temperatures in the storage is maintained, the water delivered is at a greater temperature, efficiency is increased by reducing heat standing losses, and there is greater control over the quantity of energy stored. The external apparatus may be activated in response to a heating demand for the storage or for outlet water, or even in response to a power surplus from photovoltaic equipment and in the absence of withdrawal. A control system may modulate the power of the instantaneous water heater to track the surplus power of the photovoltaic system.

Disclosed is a storage water heating system with a heating apparatus external to the storage tank. The external apparatus receives a liquid coming from a lower portion of the tank, heats it, and delivers it to a top portion of the tank, where the hot water outlet is located. In this way, the natural thermocline of temperatures in the storage is maintained, the water delivered is at a greater temperature, efficiency is increased by reducing heat standing losses, and there is greater control over the quantity of energy stored. The external apparatus may be activated in response to a heating demand for the storage or for outlet water, or even in response to a power surplus from photovoltaic equipment and in the absence of withdrawal. A control system may modulate the power of the instantaneous water heater to track the surplus power of the photovoltaic system.

A hot water supply system includes a plurality of hot water supply devices. Each of the plurality of hot water supply devices includes a hot water supply wireless communication module having a transceiver and a receiver adapted to wirelessly communicate with a mobile terminal. One hot water supply device among the plurality of hot water supply devices is paired with the mobile terminal to establish a first wireless communication path. After the one hot water supply device is paired with the mobile terminal, the one hot water supply device receives a one-time password from the mobile terminal, wherein the one hot water supply device is configured to send the one-time password to other hot water supply devices among the plurality of hot water supply devices, and the other hot water supply devices are paired with the mobile terminal using the one-time password.

A hot water supply system includes a plurality of hot water supply devices. Each of the plurality of hot water supply devices includes a hot water supply wireless communication module having a transceiver and a receiver adapted to wirelessly communicate with a mobile terminal. One hot water supply device among the plurality of hot water supply devices is paired with the mobile terminal to establish a first wireless communication path. After the one hot water supply device is paired with the mobile terminal, the one hot water supply device receives a one-time password from the mobile terminal, wherein the one hot water supply device is configured to send the one-time password to other hot water supply devices among the plurality of hot water supply devices, and the other hot water supply devices are paired with the mobile terminal using the one-time password.

A solar photovoltaic (PV) water heating system includes a tank including at least a first heating unit having at least first and second heating elements, at least one of which is switchable; a PV solar collector; an inverter adapted to convert the output from the PV collector to an alternating power supply; a modulator to modulate the alternating power supply from the inverter; a controller adapted to control the modulator and the switching of the or each switchable heating element; wherein the controller is adapted to control the modulator and the switchable heating elements to maximize the energy drawn from the PV collector.

A solar photovoltaic (PV) water heating system includes a tank including at least a first heating unit having at least first and second heating elements, at least one of which is switchable; a PV solar collector; an inverter adapted to convert the output from the PV collector to an alternating power supply; a modulator to modulate the alternating power supply from the inverter; a controller adapted to control the modulator and the switching of the or each switchable heating element; wherein the controller is adapted to control the modulator and the switchable heating elements to maximize the energy drawn from the PV collector.

A hot water supplier monitoring system includes a monitoring server monitoring hot water suppliers via a communication network. The hot water supplier supplies hot water by adjusting temperature of hot water heated by a heat exchange unit using combustion heat from combustion operation. The monitoring server accumulates operation data of combustion operation transmitted from the suppliers, and predicts and notifies malfunction occurrence for each supplier based on trend of change in the data over time. The data includes number of flame quenchings of the combustion unit in combustion operation. The monitoring server divides the suppliers into groups according to installation areas, compares the number of quenchings of same period among the groups, compares with previous number of quenchings of same group, and, for a specific group determined having an abnormal number of quenchings, excludes the data determined having an abnormal number of quenchings and predicts malfunction occurrence for each supplier.

A hot water supplier monitoring system includes a monitoring server monitoring hot water suppliers via a communication network. The hot water supplier supplies hot water by adjusting temperature of hot water heated by a heat exchange unit using combustion heat from combustion operation. The monitoring server accumulates operation data of combustion operation transmitted from the suppliers, and predicts and notifies malfunction occurrence for each supplier based on trend of change in the data over time. The data includes number of flame quenchings of the combustion unit in combustion operation. The monitoring server divides the suppliers into groups according to installation areas, compares the number of quenchings of same period among the groups, compares with previous number of quenchings of same group, and, for a specific group determined having an abnormal number of quenchings, excludes the data determined having an abnormal number of quenchings and predicts malfunction occurrence for each supplier.