A heating installation or cooling installation mixing device has a valve housing (14) including a first flow path from a first connection (A-B) to a second connection (A), and a second flow path from the first connection (A-B) to a third connection (B). A movable valve element (24), arranged inside the valve housing (14) in the flow paths, is configured to vary a ratio of cross sections of the flow paths. A valve element drive (36) is arranged on the valve housing (14) and includes an internal control device (38) for movement control of the drive (36) and includes a first communication interface (44) for external control device (40) communication and a second communication interface (46). An internal sensor (48, 50) is arranged in or on the valve housing (14) and is connected to the first communication interface (44) for transmitting a sensor signal to the external control device (40).

A combined heating system comprising a first heating subsystem including a first fluid conductor, a first heating unit adapted to heat a first fluid and output the first fluid at the outlet of the first fluid conductor, and a fluid mover adapted to move the first fluid through the first heating unit, a second heating subsystem including a second fluid conductor adapted to receive a second fluid, a third fluid conductor, a second heating unit adapted to heat the second fluid and output the heated second fluid in the third fluid conductor, a fluid mover adapted to move the second fluid from the outlet of the third fluid conductor to the inlet of the second fluid conductor, at least one heat exchanger operably connected to a downstream location of the first heating unit and a fourth fluid conductor connecting the second fluid conductor and the third fluid conductor.

A valve arrangement including: a valve inlet, a valve outlet arranged downstream of the valve inlet, a first chamber arranged directly downstream of the inlet, and a second chamber arranged between the first chamber and the valve outlet. The valve arrangement further includes a measuring nipple comprising a measuring channel for receiving a measuring device, and a closing arrangement having open positions and a closed position, wherein the closing arrangement in its closed position is configured to prevent fluid communication between the first chamber and the second chamber via the closing arrangement, and wherein the closing arrangement in its open positions is configured to allow for fluid communication between the first chamber and the second chamber via the closing arrangement.

A temperature control apparatus for a building, the apparatus comprising: an electricity generator, operable to contribute to an electrical power supply for consumer appliances at the building; a heat transfer circuit adapted to circulate heat transfer fluid to cool the electricity generator; a heating system comprising a heat source for providing heat energy to a space heater for heating at least one zone of the building and to a hot water tank arranged to store a supply of hot water for the building, and a heat exchanger adapted to supplement the heat energy from the heat source with heat energy obtained from the heat transfer circuit; a user interface adapted to enable a user to select at least one of (a) a desired temperature for the at least one zone of the building, and a first time period during which the desired temperature is to be maintained; and (b) a second time period for the supply of hot water from the hot water tank; and the apparatus further comprising: a controller configured to determine when to operate the electricity generator based on at least one of: (i) the thermal capacity of the hot water tank; and (ii) the first time period, the desired temperature and the current temperature of the at least one zone of the building.

A heat storage and transfer system incorporates a primary heat storage chamber that is thermally insulated and which in use, contains a heat storing liquid or solid and a thermal energy to electrical energy converter in or thermally coupled to at least one of: i) a secondary chamber external to and adjacent the primary heat storage chamber through which a liquid or steam to be heated is passed in use; and ii) a thermal conduction plate/surface external to the thermally insulated primary heat storage chamber or body. The system has a heat transfer feature to selectively transfer thermal energy from the heat storing liquid or solid of the primary heating chamber to the thermal conduction plate or the liquid or steam to be heated in the secondary chamber for the thermal energy to thence be converted to electrical energy by the thermal energy to electrical energy converter.

A system and method for controlling a boiler comprising a microcomputer operatively connected to a microcontroller wherein the microcontroller is configured to provide flame safeguard operations and the microcomputer is configured to provide operating control instructions to the microcontroller. The boiler control system may operate either in a stand-alone, cascade master or cascade slave configuration.

A low water sensor testing device having an initial piping unit connected to a hot water boiler and also connected to a first three way purge valve unit, which valve unit is, in turn, connected to a T-shaped piping unit and affixed within the stem portion of which there is a low water level sensor unit with the T-shaped piping unit being further connected to a second three way purge valve unit, wholly equivalent to the first valve unit, with the second valve unit being connected to an adapter unit, in turn, also connected to outflow piping carrying boiler heated water via outflow piping to the heating system of a residential or commercial structure.

A system includes a cold water supply, a water heater, a mixing valve, and one or more water use fixtures. The water heater includes a tank, a first temperature sensor configured to output a first temperature signal indicative of a water temperature of water in the tank, a heating device, and a water heater controller configured to control the water heater based on the first temperature signal and an operating temperature setting. The mixing valve outputs a mixed water flow, which is a combination of a hot water flow and a cold water flow, to the water use fixtures. A second temperature sensor outputs a second temperature signal indicative of a water flow temperature of the mixed water flow or the hot water flow, and a system controller selectively deactivates the water heater based on the second temperature signal.

A method for cooling or heating a building is provided. An air flow can be created in an air duct and the air flow can be cooled or heated by an air conditioning system or furnace. The cooled or heated air flow can then pass through a heat exchanger connected to a radiant heating loop running through a floor or slab with a liquid circulating through them. When the airflow is being cooled or heated by the air conditioning system or furnace, the air flow will alter the temperature of the liquid circulating through the heat exchanger herefore the temperature of the slab. When the temperature of the slab varies from the temperature of the building, liquid that has been circulated through the radiant heating loop can be used to alter the temperature of the air flow passing through the heat exchanger.

A distributed solar power generation and hot water supplying system includes: a photovoltaic power generation self-service sun tracking system, an inverter, a controller, a storage battery, a heat-exchanging water tank and an electric heater provided therein, wherein a solar battery and a solar collector are mounted on the photovoltaic power generation self-service sun tracking system, an electricity output terminal of the photovoltaic power generation self-service sun tracking system is respectively connected to an inversing input terminal of an inverter and a surplus power supplying input terminal of a controller; an MCU-controlled power output terminal of the inverter is respectively connected for off-grid power consumption or grid-connected power generation, and to an inversing output terminal of the controller; a charging/discharging control output/input terminal inside the inverter is connected to an input/output terminal of the storage battery and a storage battery power supplying input terminal of the controller.