The invention discloses a water heater system and a control method thereof. The water heater system comprises a heating unit capable of heating water; a tank capable of communicating with the heating unit, the tank provided with at least one inlet and outlet, the inlet being capable of supplying at least one of gas and water into the tank; a pressurizing source capable of pressurizing the tank, the pressurizing source being capable of providing a pressure at which the gas and water in the tank are mixed. The invention provides a water heater system which can be applied to any existing water heater, including an electric water heater, a gas water heater, a solar water heater, an air energy water heater, and the like, which is capable of generating microbubble water for use by a user, the microbubble water has strong cleaning performance, thereby greatly improving the user experience.

A system and a method for controlling an electrical water heater as per a load shedding request signal are disclosed. A temperature sensor is positioned so as to measure a water temperature in a lower area of a tank of the water heater to be controlled. A controller continuously determines a salubrity index of the water heater as a function of the temperature measured by the sensor and a time measurement, and decides to interrupt an electrical power supply of the water heater through a switch so as to interrupt or not interrupt an operation of the water heater upon the load shedding request signal and only if the salubrity index meets a preestablished criterion.

The invention relates to a method and an assembly for controlling the discharge of a liquid from a fitting (10), wherein the liquid discharge can be shut off by means of a shut-off valve (12) which is actuatable via a codable electric control unit (14) when the temperature of the liquid would cause a hazard.

The present invention provides an energy storage system (10) for a use with a boiler (20). The energy storage system (10) comprises a plurality of thermal energy storage banks (101, 102, 103, 104). Each thermal energy storage bank (101, 102, 103, 104) comprises phase changeable material having a predetermined phase transformation temperature. The energy storage system (10) also includes an extraction device (105; 1 15) configured to recover waste energy from the boiler (20). The extraction device (105, 1 15) is operable to extract waste energy from the boiler (20) and feed that energy to at least one (101) of the thermal energy storage banks (101, 102, 103, 104). A controller (106) is arranged, in use, to activate the extraction device (105, 115) in response to operation of the boiler (20).

The invention relates to a device (2) for automatically flushing liquid lines, in particular drinking water lines, with at least one connection (4) for a water conduit, with at least one connection (6) for a wastewater conduit, and with a flushing valve (8) which is arranged between the connections for the water conduit and wastewater conduit. The object of providing a device for automatic flushing that allows a flushing behaviour which is better tailored to the conditions is achieved in that the flushing valve (8) comprises a multiple valve with parallel valves (10). The invention further relates to a system of water lines and to a method for automatically flushing water lines using a device according to the invention.

A system for heating a first fluid flow from a first temperature to a second temperature, the system including a hot water supply line for receiving the first fluid flow at a first end and exhausting the first fluid flow at a second end; and a heating system including a heat engine, a thermal battery and a heat exchanger, wherein the thermal battery is configured to be replenished at a point of heat transfer by the heat engine and the hot water supply line is configured to receive heat from the thermal battery via the heat exchanger to elevate the temperature of the first fluid flow from the first temperature to the second temperature.

Apparatus and methods for improved hot water flushing of a water supply system.

A control unit (100, 120, 130) adapted to regulate at least one de-bacterisation unit (201) of a fluid system (200, 210, 230) is described. The fluid system (200, 210, 230) comprises the de-bacterisation unit, a production unit for producing a heated fluid heated to a predetermined temperature, at least one pipe for transporting the fluid from the production unit to at least one fluid outlet, at least one fluid outlet and at least one sensing unit for sensing a temperature of the fluid at a first location in the fluid system as a function of time. The control unit (100, 120, 130) includes a module (101, 124) adapted for obtaining temperatures at a plurality of locations in the fluid system as function of time and programmed for modelling bacterial growth in the fluid in the fluid system as function of time based on the obtained temperature in the system and for predicting, based on the modelling, the bacterial concentration at the at least one fluid outlet over time. The control unit is being adapted for driving the de-bacterisation unit, The control unit is being adapted for determining, based on said predicted bacterial concentration over time obtained by the module (101, 124), moments in time when the bacterial concentration reaches a predetermined value in the fluid system and for, in reply thereto, driving at these moments in time the de-bacterisation unit (201) so as to reduce bacterial concentration in the fluid system (200, 210, 230).

A bacteria abatement water heater abates bacterial growth and includes a fluid-isolated heat exchanger; a water heating container that heats water to a high water temperature that is greater than or equal to a kill temperature for bacteria; a hot water delivery conduit including a transitional cooling zone in thermal communication with the fluid-isolated heat exchanger and that provides bacteria-free water from the water heating container at a safe temperature.

A method for providing a warning of the risk of Legionella in a fluid conductor, the method including determining the percentage of a duration a fluid is disposed in the fluid conductor at a temperature in which Legionella can thrive during a period, wherein if the percentage of the duration is greater than about 50% of the period, a first indication of a risk of Legionella is raised.