A supply circuit for a heat exchange medium for a consumer having an inflow line for the heat exchange medium and a return line for the heat exchange medium, the lines being connected to one another by way of a consumer heat exchanger. A pumping device for conveying the heat exchange medium through the supply circuit is a frequency-controlled pumping device having a conveying pump and a frequency converter which is assigned to the conveying pump. For an industrial plant, a primary circuit is connected to a supply circuit of this type as a secondary circuit. In either case, the supply circuit is operated selectively in one of two operating modes. In a first operating mode, the temperature of the heat exchange medium which enters into the consumer heat exchanger from the inflow line is set by way of an admixture control operation in which the temperature of the heat exchange medium which enters into the consumer heat exchanger from the inflow line is set by way of an actuation of the valve. In a second operating mode, the temperature of the heat exchange medium which enters into the consumer heat exchanger from the inflow line is set by a volumetric flow control operation, by the frequency converter of the pumping device being actuated.

A method and a heat transfer system for limiting a supply flow (q.sub.S) in a heat transfer system which includes a supply conduit (10) with a supply flow (q.sub.S) and with a supply entry temperature (T.sub.S), and at least one load circuit (2) with a load pump (20) which provides a load flow (q.sub.L) with a load entry temperature (T.sub.L) and a load exit temperature (T.sub.R). The load entry temperature (T.sub.L) is set by way of changing the supply flow (q.sub.S), wherein the supply flow (q.sub.S) is limited to a maximal flow (q.sub.S, max), taking into account at least one temperature detected in the load circuit (2).

An apparatus and system for efficiently and safely transferring heat from a masonry heater to an external heating device using coil pipes and a liquid circulation pump. Circulation of a heat transfer liquid in the apparatus and system is controlled based on the measured temperature of the heat transfer liquid in the coil pipe on a return side of the masonry heater. Two additional sensors near the external heating device are used to control the flow rate of the circulation of the heat transfer liquid in the apparatus and system, thereby controlling the amount of heat actually transferred to the external heating device.

A hydronic system and method of use that will maintain normal system operating pressure while also reliably detecting even very small fluid losses in any closed loop fluid heat transfer system is described. The system includes a controller in communication with one or more pressure sensors and optionally one more temperature sensors that provides one or more notifications when the pressure drops below predetermined levels.

An electronic converter unit (30, 86, 87) for being arranged external to a pump unit (10) is described. The pump unit (10) includes a housing (12), which comprises a signal source (16, 18) for emitting a signal. The electronic converter unit (30, 86, 87) comprises a signal detector (40) for measuring the signal emitted from the signal source (18) of the pump unit (10). The electronic converter unit (30) further comprises a converter unit (41) for converting said signals to electrical signals, and transmitting means (42) for transmitting the electrical signals to an external communication unit (50). The electronic converter unit (30, 86, 87) is further configured to operate in a signal converter mode (30) and a signal repeater mode (86, 87).

A residential and commercial hot water and steam boiler safety system and device that includes at least one hollow pipe, with one plugged or sealed end and a fitting on the other end for connecting the pipe in a substantially vertical mounting position, and at least one two float switch disposed in the pipe and electrically connected in series with a limit switch in the boiler, where the pipe is adopted for the flow and accumulation of water, so that float switch activates as the pipe fills with water and shuts off the boiler by turning off the gas valve, promoting safer boiler and steam boiler operation. Additional float switches positioned above or below in the hollow pipe may provide additional functions, such as a warning light and sound to the owner, or a notification via a telephone or cell phone system or through the home network or Wi-Fi system.

A manifold for the distribution of a fluid in a plumbing and heating system has a tubular shape and defines in its interior a distribution conduit for the fluid. The manifold extends between a first inlet/outlet end and a second inlet/outlet end, both of which are designed to put the distribution conduit in communication with the exterior of the manifold to receive incoming fluid or to send fluid exiting the manifold. The manifold comprises a plurality of branches arranged in series along a longitudinal extension and interposed between the first and second inlet/outlet ends, wherein each branch allows a quantity of fluid to enter into or exit from the distribution conduit. Each branch is provided with an access or exit opening having a respective axis, and the branches are positioned in the manifold in such a way that: the distance between the first inlet/outlet end and the axis of the first branch is equal to an initial stretch, the centre-to-centre distance between the axis of each branch and the axes of the adjacent branches is equal to a centre-to-centre distance measurement between the branches, and the distance between the axis of the last branch and the second inlet/outlet end is equal to a final stretch. The length of the final stretch is equal to the sum of the length of the initial stretch and half of the centre-to-centre distance measurement.

A hot water system, such as a Domestic Hot Water (DHW) system, combines the best characteristics of a tankless heater and a hot water storage tank to provide superior energy and water savings and safety. The storage tank does not need an internal heat source. Tank hot water may be recovered through the tankless heater. A first control (A) activates hot water recirculation from the storage tank to safely heat pipes to supply, for example, a sink, with no wasted water. The tankless heater supplies a greater demand, such as for a shower or tub. A second control (B) activates a cold-water diverter to the supply from the storage tank to the tankless heater. A water flow sensor keeps the tankless heater as the hot water source until the water flow stops. The so-called cold-water-sandwich is eliminated, and waste of water or heat is reduced.

A hydronic system includes a partition, a first conduit embedded in a first side of the partition, a second conduit embedded in a second side of the partition, a first sheet of finishing material covering the first conduit, a second sheet of finishing material covering the second conduit, and at least one valve and at least one pump. The at least one valve and at least one pump are configured to control a flow of a fluid inside the first conduit and the second conduit. When the hydronic system is operating in an isolating mode, the fluid flows in a first closed loop through the first conduit and the fluid flows in a second closed loop through the second conduit. When the hydronic system is operating in a heat exchange mode, the fluid flows between the first conduit and the second conduit in a third closed loop.

A system and method for improving the responsiveness of forced hot water heat exchangers placed around the baseboards of conditioned living spaces and improving the efficiently of centralized hot water heating systems. The control system may comprise a convector baseboard heat exchanger or a replacement heat exchanger cover, and a blower, a diffuser and sensors which are mounted to one or more of the baseboard heat exchangers, the heating system influent and effluent loops, the fuel supply and the recirculation pump. When the heating system and forced hot water loop reaches its operating temperature, the blower activates to rapidly transfer energy from the-forced hot water loop into the air and disperse treated, heated air into the conditioned spaces. After the centralized heating system turns off, the system continues to transfer energy from the forced hot water into the air of the conditioned spaces until the latent heat of the centralized heating system has been extracted and the return loop temperatures are at levels consistent with optimal boiler performance.