An electric fan powered register booster for a forced air vent in a HVAC system where the booster is configured to stop operation when either of the following events has occurred: 1) the current temperature in the booster has regressed from a recent stored extreme temperature or 2) a predetermined setpoint temperature is between the current temperature and the stored extreme temperature.

A strainer (101) for use in fluid piping. The strainer (101) comprises a body (102) for connection to a fluid piping inflow conduit (201) and to a fluid piping outflow conduit (202). The body (102) defines an interior chamber (103), a fluid inlet port (104) and a fluid outlet port (105). The body (102) defines a fluid flow path (106) between the fluid inlet port (104) and the fluid outlet port (105) that extends through the interior chamber (103). The strainer (101) comprises a screen collector (107) that is removably locatable in the body (102), within the fluid flow path (106). The strainer (101) further comprises a permanent magnet collector (102) that is removably locatable in the body (102). The strainer (101) may be used in fluid circuit piping of a heating or a cooling system.

The present invention becomes possible to employ a main microprocessor with a relatively lower number of input ports, whereby while maintaining the performance and function of a water heater, the cost of a control apparatus is cut down. Some of sensors, adapted for measurement of various parameters which are for use in operational control of the water heater and in need of immediate response, are connected to a main microprocessor 31. The other sensors that are not in need of an immediate response, such as an ambient temperature sensor 36, are connected only to a sub microprocessor 32 if the main microprocessor 31 does not have any extra analog signal input port. The sub microprocessor converts an analog signal from the sensor 36 which is connected only to the sub microprocessor into digital data. And the sub microprocessor transmits the digital data to the main microprocessor through communication therewith.

A heat exchanger according to the present disclosure includes a plurality of tubes through which heating water flows, a housing having an interior space in which the plurality of tubes are disposed and through which a combustion gas passes, the housing including a plurality of flow passage caps connected with distal ends of the plurality of tubes to cause the heating water to flow through the flow passage caps, a temperature sensor brought into close contact with an area between two flow passage caps adjacent to each other among the plurality of flow passage caps to obtain a temperature, and a bracket coupled to the housing to bring the temperature sensor into close contact with the area between the adjacent two flow passage caps.

A tankless water heater includes a scale control module (SCM). The SCM is mounted inside or outside of a cabinet which encloses a heat exchanger and source of heat of the water heater. The SCM may include a connector and a cartridge removably attaching to the connector or may only include a cartridge permanently affixed to the tankless water heater. The tankless water heater includes a continuous water pathway inside the cabinet to supply water to all components of the tankless water heater, including the SCM. The tankless water heater receives supply water at its inlet, treats the supply water in the SCM to generate treated water having reduced scale-forming characteristics compared to the supply water, and heats the treated water in the heat exchanger to generate heated treated water.

A hydronic distribution system includes self-regulating valves networked together and operable to share valve temperature and valve position information with a microprocessor or other type of controller. The microprocessor runs one or more algorithms that process the temperatures and positions of the valves and then computes a desired speed for one or more variable speed pumps within the system. Controlling the pumps to operate at the desired speed and still maintain the correct amount of process fluid flow needed by the system reduces the overall energy use of the hydronic distribution system, saves on the operational lives of the pumps, and increases system efficiency.

A removal device for removing gas bubbles and/or dirt particles from a liquid in a liquid conduit system includes a housing having an entry and an exit and, a main ongoing flow channel which extends through the housing from the entry to the exit, a plurality of branch flow channels, each branch flow channel branching off from the main flow channel at a branch point, at least one quiet zone which is provided at the ends of the branch flow channels, at least one return flow channel for a return flow from the at least one quiet zone back to the main flow channel, where the return flow channel merges with the main flow channel at a merge point, and where the branch flow channels are defined by plates which are curved.

A removable heatsink assembly adapted to removably receive a pipe. The removable heatsink assembly includes a first plurality of fins and a second plurality of fins having collar flanges sized to receive a pipe. The fins are received on first and second spacer rods, respectively and are hingedly connected by a hinge rod such that the first and second plurality of fins are pivotally movable about the hinge rod between an open position and a closed position. In the open position, the first and second plurality of fins are positionable over the pipe. In the closed position, the collar flanges of the first and second plurality of fins substantially surround the pipe. A fin clamp secures the first and second plurality of fins together in the closed position about the pipe.

A controller performs a first operation in which a heat source device directly or indirectly heats water in a first channel of a heat exchanger and a second operation in which the heat source device directly or indirectly cools the water in the first channel of the heat exchanger after the first operation ends.

An onboard system for winterizing vessels includes an antifreeze storage system. The onboard system includes a control system capable of determining one or more of the one or more system components to be winterized, an antifreeze storage system, and one or more pumps capable of pumping antifreeze from the antifreeze storage system. The antifreeze flows through the determined one or more system components to be winterized.