A gas valve for a gas appliance of a gas burner system. The gas valve is connected to a gas source via a gas pipe. The gas valve is disposed with a check valve body, wherein the check valve body allows gas in the gas pipe to flow into the gas valve and prohibits the gas in the gas valve to flow into the gas pipe so the check valve body can thereby prevent the gas in the gas valve from flwoing back to the gas pipe. When gas in the gas pipe flows to to another gas appliance of the gas burner system, the gas flowing to another gas appliance does not mix with air in the gas appliance, thereby reducing the iginition time and enhancing the combustion efficiency.

A thermal battery including a container including an interior space configured for receiving a heat transfer fluid; and a coil disposed in the interior space of the container, the coil comprising an inlet end and an outlet end, wherein at least one of the inlet end of the coil and the outlet end of the coil is configured to be movably disposed with respect to the container through at least one aperture of the container, wherein one of an expansion and a contraction of the coil is accommodated by allowing movement of the coil relative to the container.

A jacket for a hot water heater appliance includes a top, bottom, front, back, and a fastener. The top is configured to insulate an upper portion of a hot water tank. The bottom is configured to insulate a lower portion of the hot water tank. The front is configured to insulate a front portion of the hot water tank. The back is configured to insulate a back portion of the hot water tank. The fastener is configured to releaseably fasten the front to the back. The top, bottom, front and back include expanded polypropylene (EPP) configured to provide insulation to the hot water tank.

The concepts relate to reducing energy loss associated with hot water systems. One example is manifest as a system with an automatic hot water recovery apparatus and selective hot water isolation devices. In one example a selective hot water isolation device is configured to be connected in fluid flowing relation with a first water line and a second water line and the selective hot water isolation device is configured to control water cross-over from the second water line into the first water line based upon water flow through the first water line.

A water heater (1) includes a housing (8), combustion devices (31, 32), heat exchangers (41A to 42B), a water supply pipe (P1), a hot water supply pipe (P2), a water supply connection member (10), a hot water supply connection member (20), a water quantity control part (50), and a fine bubble generator (9) in fluid connection with either the water supply pipe (P1) or the hot water supply pipe (P2). The fine bubble generator (9) has an inflow port (91H), into which hot water flows from an upstream side (P2U), and an outflow port (92H), out of which hot water containing the fine bubbles is discharged to a downstream side (P2D). The fine bubble generator (9) is located below burner ports (31F, 32F) of the combustion devices.

A tankless water heater, comprising: a flow channel with a cold-water inlet pipe, a heating unit with an heating element configured to heat water flowing through the heating unit and a hot-water outlet pipe, and a control unit configured to control the tankless water heater, wherein the control unit is configured to receive a power limitation signal of an external facility management system and to control a heating output of the heating element depending on the power limitation signal.

A dual-function water conditioning system and method thereof are disclosed that heat or cool water on demand to overcome seasonal discomfort. The system includes a thermally insulated water conditioning chamber coupled to a heating mechanism and a refrigeration-based cooling mechanism, governed by an electronic controller. A user interface or remote application allows selection of a target temperature, and the controller regulates conditioning to deliver water through outlet while being integrable with existing pipelines without loss of pressure. The invention further relates to intelligent water mixing and control systems that adapt faucet operation to seasonal variations in supply temperature, thereby preventing user confusion and ensuring year-round comfort. Additional features include a detachable phase change material (PCM) cooling attachment (130), IoT connectivity, adaptive learning, and safety measures such as thermostatic mixing, leak detection, and pressure/vacuum relief for efficient and hygienic operation.

A thermal battery including a container including an interior space configured for receiving a heat transfer fluid; and a coil disposed in the interior space of the container, the coil comprising an inlet end and an outlet end, wherein at least one of the inlet end of the coil and the outlet end of the coil is configured to be movably disposed with respect to the container through at least one aperture of the container, wherein one of an expansion and a contraction of the coil is accommodated by allowing movement of the coil relative to the container.