The present invention relates to a heating system for heating a fluid medium, said heating system comprises a carrier unit and a heating unit, with the carrier unit having a surface comprising at least a plane portion being at least substantially normal to a longitudinal axis and an at least part-circularly shaped groove extending from said carrier unit and wound about the longitudinal axis, and the heating unit having a heating element at least partially arranged in said groove of said carrier unit. In the inventive heating system, the groove extends at least partially helically about the longitudinal axis. The present invention further relates to a heated conveyor pump for conveying and heating a fluid medium, said pump comprises a drive unit, a pump housing and the inventive heating system. The heating system is coupled to the pump housing with the groove extending into the pump housing in a manner such that the size of the cross-section of the groove decreases in the flow direction of the conveyed fluid medium.

Disclosed herein are heat exchanger devices comprising an outer shell defining an interior chamber that is configured to pass a heat transfer fluid therethrough, a tube at least partially disposed within the interior chamber and in thermal communication with the heat transfer fluid, the tube being connected to a pool and configured to flow water from the pool therethrough such that the water flowing through the tube exchanges heat with the heat transfer fluid, and a coating disposed on an interior surface of the tube contacting the water from the pool, the coating comprising Nickel. The coating can comprise an additive, such as an electroless Nickel coating. The coating can also be selected from the group consisting of polytetrafluoroethylene (PTFE), Boron Nitride (BN), Silicon Carbide (SiC), aluminum oxide (Al.sub.2O.sub.3), carbon (C), and carbon allotropes.

In one example, a system for collecting scale from water in a water heating appliance includes a reservoir having an interior, an inlet through which the water flows into the interior, and an outlet through which the water flows from the interior, the inlet, the outlet, and the interior defining a water pathway. A filter is positioned within the interior of the reservoir and the filter is oriented to traverse the water pathway and divide the interior of the reservoir into an upstream section into which the water flows from the inlet and a downstream section from which the water flows to the outlet. A collection chamber is configured to receive scale as the water flows along the water pathway through the interior of the reservoir and the water passes through the filter. The collection chamber is positioned in or adjacent the upstream section of the interior of the reservoir.

In one example, a system for collecting scale from water in a water heating appliance includes a reservoir having an interior, an inlet through which the water flows into the interior, and an outlet through which the water flows from the interior, the inlet, the outlet, and the interior defining a water pathway. A filter is positioned within the interior of the reservoir and the filter is oriented to traverse the water pathway and divide the interior of the reservoir into an upstream section into which the water flows from the inlet and a downstream section from which the water flows to the outlet. A collection chamber is configured to receive scale as the water flows along the water pathway through the interior of the reservoir and the water passes through the filter. The collection chamber is positioned in or adjacent the upstream section of the interior of the reservoir.

The present invention relates to a heating system for heating a fluid medium, said heating system comprises a carrier unit and a heating unit, with the carrier unit having a surface comprising at least a plane portion being at least substantially normal to a longitudinal axis and an at least part-circularly shaped groove extending from said carrier unit and wound about the longitudinal axis, and the heating unit having a heating element at least partially arranged in said groove of said carrier unit. In the inventive heating system, the groove extends at least partially helically about the longitudinal axis. The present invention further relates to a heated conveyor pump for conveying and heating a fluid medium, said pump comprises a drive unit, a pump housing and the inventive heating system. The heating system is coupled to the pump housing with the groove extending into the pump housing in a manner such that the size of the cross-section of the groove decreases in the flow direction of the conveyed fluid medium.

A controller for a tankless water heater is programmed to perform a descaling procedure that includes: closing a bypass valve to prevent fluid from bypassing a heat exchanger of the tankless water heater; activating a pump to cause a descaling solution to circulate through the tankless water heater; monitoring a flow rate of the descaling solution; and deactivating the pump responsive to one of: i) an amount of time that the pump is active exceeding a time limit, ii) the flow rate exceeding a first threshold, or iii) a change in the flow rate exceeding a second threshold.

A controller for a tankless water heater is programmed to perform a descaling procedure that includes: closing a bypass valve to prevent fluid from bypassing a heat exchanger of the tankless water heater; activating a pump to cause a descaling solution to circulate through the tankless water heater; monitoring a flow rate of the descaling solution; and deactivating the pump responsive to one of: i) an amount of time that the pump is active exceeding a time limit, ii) the flow rate exceeding a first threshold, or iii) a change in the flow rate exceeding a second threshold.

A modular water heater tank design is provided that enhances the longevity and efficiency of domestic hot water heaters. Interchangeable upper and lower pans allow the water tank to be inverted after several years of continuous use. By repositioning the pans, the thermal stress and temperature gradients experienced by the tank are significantly reduced, thereby extending its operational life. Additionally, the salt precipitation within the tank is removed from new lower pan, ensuring improved heat absorption and preventing premature corrosion.

A hot water tank includes a body, a first part, and a weld formed by welding of the body and the first part to each other. The body is made of a corrosion-resistant material other than austenitic stainless steel.

A hot water tank includes a body, a first part, and a weld formed by welding of the body and the first part to each other. The body is made of a corrosion-resistant material other than austenitic stainless steel.