A burner appliance is disclosed. The burner appliance includes a byproduct sensor in an exhaust flue and/or a barometric pressure sensor to detect an environmental pressure at the burner appliance. By calculating concentrations of combustion byproducts in the exhaust with the byproduct sensor, a controller can adjust blower speed and/or fuel rate to modify combustion efficiency. By calculating the environmental pressure at the burner with the barometric pressure sensor, the controller can adjust blower speed and/or fuel rate to modify combustion efficiency. The barometric-pressure data can also be used to adjust blower speed control bands, thereby calibrating the control bands based on environmental pressure. The environmental pressure can be indicative of altitude and/or weather conditions. Methods of operating said burner appliance are also disclosed.

Systems and methods are directed to water heater systems, including combi boilers and instantaneous water heaters, for initiating off-cycle purge operations, e.g., for energy reductions and efficiency means. Embodiments of the present invention can include at least one heat exchanger configured to heat water, at least one temperature sensor measuring water temperature at one or more locations within the heater system, and a control system in communication with the at least one heat exchanger. The control system can be configured to at least: determine an expected flow demand for hot water; monitor water temperature at an outlet of the at least one heat exchanger, initiate a burner sequence when the outlet temperature is greater than a delivery target temperature, and initiate a purge sequence when the when the outlet temperature is greater than a threshold temperature.

Systems and methods are directed to water heater systems, including combi boilers and instantaneous water heaters, for initiating off-cycle purge operations, e.g., for energy reductions and efficiency means. Embodiments of the present invention can include at least one heat exchanger configured to heat water, at least one temperature sensor measuring water temperature at one or more locations within the heater system, and a control system in communication with the at least one heat exchanger. The control system can be configured to at least: determine an expected flow demand for hot water; monitor water temperature at an outlet of the at least one heat exchanger, initiate a burner sequence when the outlet temperature is greater than a delivery target temperature, and initiate a purge sequence when the when the outlet temperature is greater than a threshold temperature.

A water supply system includes a main water tank that is configured to store water and includes a heater to heat the stored water to close to but below a boiling temperature thereof, to provide main heated water. A dispenser water tank receives a portion of the main heated water, and is free of any heating elements to add heat to the water stored therein, and providing dispensable heated water. A water mixer includes a first pipe for receiving the dispensable heated water from the dispenser tank and a second pipe for receiving utility water from a faucet that supplies utility-provided water, with a mixing chamber from which the waters from the first pipe and the second pipe are dispensed and/or in which these waters are admixed.

Provided is a gas furnace including a primary heat exchanger and a secondary heat exchanger through which a combustion gas produced by the combustion of a fuel gas flows. The gas furnace includes: a coupling box serving as an intermediary to connect the primary heat exchanger and the secondary heat exchanger; a collect box connected to the secondary heat exchanger, for letting in the combustion gas passed through the secondary heat exchanger; an inducer connected to the collect box, for inducing a flow of the combustion gas; and a bypass pipe connected to one side of the coupling box and including a bypass pipe for guiding the combustion gas passed through the primary heat exchanger to a hot water supply tank for supplying hot water to an indoor space.

The disclosed technology includes a system and method of preventing short cycling in a water heater. The system can include a burner, a temperature sensor, and a controller. The controller can be configured to perform several steps to determine whether to turn on a burner and whether to increment a temperature offset value based on the amount of time that has elapsed since the last time the burner was on.

A recreational vehicle heating system comprises: a heating medium heater, a hot water supply heat exchanger, a heating medium circuit including a pump and a waste heat exchanger, and a heating medium tank compartmented by vertical partitions configured to allow for the heating medium flow over the partitions from one compartment to another in a sequential order, the hot water supply heat exchanger being arranged in one of the tank compartments, while the other tank compartments are part of heating medium circuits each including a pump and a waste heat exchanger. The first tank compartment in said sequential order is connected, via a conduit, to the heating medium heater, while the last tank compartment in said sequential order is configured to allow for the heating medium flow over to the conduit for the heating medium transfer by a pump via the heater to the first compartment.

A method of controlling water heater pilot flame ignition includes receiving, by a controller of a water heater, a user input and controlling a pilot gas valve to start a gas flow to a pilot burner in response to the user input. The method further includes, in response to the user input, controlling, by the controller, an igniter to generate an ignition spark for lighting a pilot flame. The method also includes controlling, by the controller, the pilot gas valve to maintain the gas flow to the pilot burner if the pilot flame is lit.

A water heating and treatment system includes a water heater operatively coupled to a water heater controller, 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 operatively coupled to an anti-scale device controller, and at least one sanitation device operatively coupled to a sanitation device controller. The mixing station is operatively coupled to a mixing station controller. The mixing station supplies heated water to at least a first temperature zone at a first hot water temperature. Controllers of the water heater controller, the anti-scale device controller, the sanitation device controller and the mixing station controller are co-located at a front of a single enclosure behind an openable door, the controllers operatively coupled to a supervisory controller.

A portable heating and cooling container for keeping retained liquids heated or cooled in the same compartment. An insulated vessel with a foam or vacuum insulating layer keeps the retained liquids at a consistent temperature for long periods of time. A heating component is attachable to an outside of an insulated vessel. The heating element is not used when the retained liquids are desired to be cool or cold. The heating component may penetrate either a double sidewall of the vessel housing or the vessel lid. A resistance heating element is retained within the insulated vessel to heat the retained liquid on demand as desired allowing for access to heated liquids remotely.