Abstract: Systems and methods are directed to water healer systems, including combi boilers and instantaneous water heaters, for initiating pre-heat and energy savings operations. Embodiments of the present invention can include at least one heat exchanger, a plurality of temperature sensors sensing water temperature at one or more locations within the water heater system, and a control system in communication with the first and second heat exchangers. In embodiments, the control system can be configured to at least: determine an expected demand for hot water, determine a target modulation rate based on the plurality of temperature sensors, and the expected demand, monitor the plurality of temperature sensors and a flow rate, and update the modulation rate based on at least one of a detected change in flow rate and a detected change in at least one of the plurality of temperature sensors.

Abstract: A cover plate assembly for use with a furnace system is provided. The cover plate assembly includes a plate, a central opening formed within the plate, a hatch lid positioned at least partially within the central opening and the hatch lid having a body with a baffle area. The cover plate assembly further includes an inlet structure designed to direct a fluid fuel source towards the central opening. The baffle area is positioned towards the inlet structure forming a fluid pathway between the inlet structure and the baffle area. In some instances, the hatch lid is removable such that internal components of the furnace system can be accessed without having to remove the entire cover plate assembly. Also, the cover plate assembly provided herein is designed to distribute a fuel source evenly into a combustion chamber and reduce noise-producing harmonic effects in the furnace system.

Abstract: Systems and methods are directed to water healer systems, including combi boilers and instantaneous water heaters, for initiating pre-heat and energy savings operations. Embodiments of the present invention can include at least one heat exchanger, a plurality of temperature sensors sensing water temperature at one or more locations within the water heater system, and a control system in communication with the first and second heat exchangers. In embodiments, the control system can be configured to at least: determine an expected demand for hot water, determine a target modulation rate based on the plurality of temperature sensors, and the expected demand, monitor the plurality of temperature sensors and a flow rate, and update the modulation rate based on at least one of a detected change in flow rate and a detected change in at least one of the plurality of temperature sensors.

Abstract: Systems and methods are directed to water heater systems, including combi boilers and instantaneous water heaters, for initiating back up operations, e.g., for continuous flow and hot water delivery, in response to errors or interruptions to normal operations. Embodiments of the present invention can include, a plurality of heat exchangers, including a domestic hot water outlet, temperature sensors sensing water temperature at one or more locations within the water heater system, a control system. The control system can be configured to at least: monitor the water temperature measured by the first temperature sensor, identify an abnormality in monitoring the water temperature, initiate am alternative operation to sense water temperature via an alternate pathway and heat water to a set point value during the abnormality, and deliver water heated to the set point value during the abnormality.

Abstract: 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.

Abstract: Systems and methods are directed to water heater systems, including combi boilers and instantaneous water heaters, for initiating pre-heat and energy savings operations. Embodiments of the present invention can include at least one heat exchanger configured to heat water; 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; sense water temperature at one or more locations, including at a domestic hot water outlet; determine an end to the expected flow demand for hot water; upon receiving an indication to end the flow of hot water, initiate a recovery demand determination; and initiate a pre-heat operation based on the recovery demand determination.