According to the present invention, disclosed is a pipe fluid heat exchange flat pipe, which has a cross section having a width direction size that is larger than the size in the height direction thereof, extends in a longitudinal direction, and has a plurality of flat parts and curved parts that are alternately formed, wherein a plurality of lower guides protruding from the inner lower surface of the flat pipe toward the upper side thereof and upper guides protruding from the inner upper surface of the flat pipe toward the lower side thereof are alternately provided in the width direction of the flat pipe, and either the lower guide or the upper guide has an overlapping part overlapped with the other from either of the adjacent lower guide or upper guide in the height direction of the flat pipe.

According to the present invention, disclosed is a pipe fluid heat exchange flat pipe, which has a cross section having a width direction size that is larger than the size in the height direction thereof, extends in a longitudinal direction, and has a plurality of flat parts and curved parts that are alternately formed, wherein a plurality of lower guides protruding from the inner lower surface of the flat pipe toward the upper side thereof and upper guides protruding from the inner upper surface of the flat pipe toward the lower side thereof are alternately provided in the width direction of the flat pipe, and either the lower guide or the upper guide has an overlapping part overlapped with the other from either of the adjacent lower guide or upper guide in the height direction of the flat pipe.

A water preconditioner system comprising a user interface for manually or automatically receiving inputs from a user, a mixing assembly including a plurality of control valves coupled to hot and cold water supply lines, and a controller in communication with the plurality of control valves and the user interface for controlling the operation of the system. The controller is configured to operate in a plurality of modes to precondition the water to one of a desired preset water dispensing temperature or a target temperature different from the desired preset water dispensing temperature.

A water preconditioner system comprising a user interface for manually or automatically receiving inputs from a user, a mixing assembly including a plurality of control valves coupled to hot and cold water supply lines, and a controller in communication with the plurality of control valves and the user interface for controlling the operation of the system. The controller is configured to operate in a plurality of modes to precondition the water to one of a desired preset water dispensing temperature or a target temperature different from the desired preset water dispensing temperature.

A system for heating a building, including a heat generator to heat a carrier fluid, at least one radiating element for transferring heat to a thermal load included in a building, a delivery conduit for transferring the carrier fluid from the heat generator to the radiating element, a return conduit for transferring the carrier fluid from the radiating element to the heat generator, a three-way valve arranged along the delivery conduit and connected to the return conduit, the three-way valve being operable to mix the carrier fluid in the delivery conduit to the carrier fluid in the return conduit, a plurality of temperature sensors arranged to measure the temperature of the carrier fluid and a temperature of the environment outside the building, and a control unit operatively connected to the heat generator, to the three-way valve and to the temperature sensors.

A system for heating a building, including a heat generator to heat a carrier fluid, at least one radiating element for transferring heat to a thermal load included in a building, a delivery conduit for transferring the carrier fluid from the heat generator to the radiating element, a return conduit for transferring the carrier fluid from the radiating element to the heat generator, a three-way valve arranged along the delivery conduit and connected to the return conduit, the three-way valve being operable to mix the carrier fluid in the delivery conduit to the carrier fluid in the return conduit, a plurality of temperature sensors arranged to measure the temperature of the carrier fluid and a temperature of the environment outside the building, and a control unit operatively connected to the heat generator, to the three-way valve and to the temperature sensors.

The present disclosure is directed to a hot water recirculation system with a return tee. The system includes a water heater, several supply lines, and a return tee. The hot water supply line is communicatively coupled to the water heater and at least one fixture and provides heated water from the water heater to the at least one fixture. The cold water supply line provides cold water from a cold water source to the water heater. Finally, the return line is communicatively coupled to the hot water supply line and delivers cooled water from the hot water supply line to the water heater. A return tee is communicatively coupled to the return line, the cold water supply line, and the water heater. This return tee provides cooled water from the return line and cold water from the cold water supply line to the water heater, which heats the water.

The present disclosure is directed to a hot water recirculation system with a return tee. The system includes a water heater, several supply lines, and a return tee. The hot water supply line is communicatively coupled to the water heater and at least one fixture and provides heated water from the water heater to the at least one fixture. The cold water supply line provides cold water from a cold water source to the water heater. Finally, the return line is communicatively coupled to the hot water supply line and delivers cooled water from the hot water supply line to the water heater. A return tee is communicatively coupled to the return line, the cold water supply line, and the water heater. This return tee provides cooled water from the return line and cold water from the cold water supply line to the water heater, which heats the water.

A tank-type water heater includes a storage tank and a heating circuit outside of the tank. The heating circuit includes at least one heat engine and at least one pump for circulating water from the bottom of the tank through the heat engine and back to the top of the tank. A stratifier introduces the heated water from the heating circuit into the top of the tank in a diffuse manner to promote stratification of hot water in the tank.

A tank-type water heater includes a storage tank and a heating circuit outside of the tank. The heating circuit includes at least one heat engine and at least one pump for circulating water from the bottom of the tank through the heat engine and back to the top of the tank. A stratifier introduces the heated water from the heating circuit into the top of the tank in a diffuse manner to promote stratification of hot water in the tank.