In a split system heat pump cooling and heating system, an auxiliary hot water storage tank is provided as an energy storage bank. Two sets of coils run through this storage tank, a first set carrying hot refrigerant from the heat pump to deposit energy and a second set carrying hot potable water to remove energy. Valve and switch matrixes are operated at the heat pump to provide hot potable water from the energy storage bank during both normal space heating and cooling operations of the heat pump.

In a split system heat pump cooling and heating system, an auxiliary hot water storage tank is provided as an energy storage bank. Two sets of coils run through this storage tank, a first set carrying hot refrigerant from the heat pump to deposit energy and a second set carrying hot potable water to remove energy. Valve and switch matrixes are operated at the heat pump to provide hot potable water from the energy storage bank during both normal space heating and cooling operations of the heat pump.

A sacrificial anode for a water heater system is provided. The anode may comprise a proximal end, a distal end, and a passage running longitudinally between the distal and proximal end. A first current carrying lead and a first voltage lead may be connected to the distal end of the anode, while a second current carrying lead a second voltage lead may be connected to the proximal end of the anode. The first current carrying lead and first voltage lead may be connected to the distal end of the anode in such a manner that the leads may be fed through the passage of the anode and protrude from the proximal end of the anode. A method of determining the health of a sacrificial anode is further provided, which involves utilizing the resistance drop across the anode to determine the radius of the anode during use.

A sacrificial anode for a water heater system is provided. The anode may comprise a proximal end, a distal end, and a passage running longitudinally between the distal and proximal end. A first current carrying lead and a first voltage lead may be connected to the distal end of the anode, while a second current carrying lead a second voltage lead may be connected to the proximal end of the anode. The first current carrying lead and first voltage lead may be connected to the distal end of the anode in such a manner that the leads may be fed through the passage of the anode and protrude from the proximal end of the anode. A method of determining the health of a sacrificial anode is further provided, which involves utilizing the resistance drop across the anode to determine the radius of the anode during use.

A water heater monitoring and notification method includes determining, by a controller of a water heater system, a deviation of a duration of a pre-purge operation from a pre-purge duration average value. The method further includes determining, by the controller of the water heater system, a deviation of a flame current from a flame current average value and determining, by the controller of the water heater system, a deviation of a pulse-width-modulation (PWM) parameter from a PWM parameter average value. The method also includes providing a notification related to a combustion system of the water heater system based on at least the deviation of the duration of the pre-purge operation from the pre-purge duration average value, the deviation of the flame current from the flame current average value, and the deviation of the PWM parameter from the PWM parameter average value.

A water heater monitoring and notification method includes determining, by a controller of a water heater system, a deviation of a duration of a pre-purge operation from a pre-purge duration average value. The method further includes determining, by the controller of the water heater system, a deviation of a flame current from a flame current average value and determining, by the controller of the water heater system, a deviation of a pulse-width-modulation (PWM) parameter from a PWM parameter average value. The method also includes providing a notification related to a combustion system of the water heater system based on at least the deviation of the duration of the pre-purge operation from the pre-purge duration average value, the deviation of the flame current from the flame current average value, and the deviation of the PWM parameter from the PWM parameter average value.

A monitoring system (10) for monitoring parameters of a fluid heater. The heater (30) comprises a storage vessel (32) for storing heated fluid therein. The monitoring system (10) includes a first sensor (12) and associated first electrical metering circuitry (14), a second sensor (16) and associated second electrical metering circuitry (18), and a control switch (22). The control switch (22) is operable so as to be able to adopt a first mode of operation in which the first electrical metering circuitry (14) is activated, and, a second mode of operation in which the second electrical metering circuitry is activated. The monitoring system (10) also includes a controller (24) for causing periodic operation of the control switch so that it switches between the first and second modes of operation.

A water heating and treatment system with UV lamp and anti-scale water treatment sanitation for suppression of pathogens and undesired bacterial content in a domestic hot water system includes an anti-scale device, and a UV sanitation lamp. A single or multiple mixing station supplies heated water to one or multiple temperature zones. A water heater sanitation loop includes a sanitation loop pump to circulate hot water within the water heater. A three-way return water diverter valve allows for safe sanitation of a domestic hot water system by diverting over temperature re-circulated water away from the mixing valve to a drain, as needed. A method for treating hot water to suppress pathogens and undesired bacterial content in a domestic hot water system is also described.

A water heating and treatment system includes a water heater, a hot water outflow line from the water heater, and a cold water supply line to supply water to the water heater. The cold water supply line includes at least one of an anti-scale device, and a UV sanitation lamp. A mixing station supplies a temperature regulated heated water to one or multiple temperature zones. The water heater, the anti-scale device, the UV sanitation lamp, and the mixing station are contained in a single enclosure having at least one transparent wall through which components can be viewed. A method for treating hot water to suppress pathogens and undesired bacterial content in a domestic water system is also described.

A powered anode current drive device is configured to automatically determine an anode drive current that offsets galvanic corrosion in a vessel. A method alerts a user on a change of an output of a powered anode current drive device. The method includes receiving an anode drive level output of the powered anode current drive device, determining electrical characteristics of the anode drive level output, analyzing the determined electrical characteristics for anomalous behavior, and generating an alert of the anomalous behavior.