Embodiments described herein generally relate to a domestic hot water (DHW) preheater operable to supply domestic hot water to a structure and/or to preheat a cold return of a space heating system.

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 fireplace system includes a fireplace, a thermal energy storage system (TESS) implemented with the fireplace and including one or more heat storing materials in which thermal energy is stored, and a control system comprising one or more controllers operatively coupled with the fireplace and the TESS. The control system is operable to control operation of the fireplace and the TESS to release the stored thermal energy from the one or more heat storing materials into a surrounding environment based on one or more inputs.

A fireplace system includes a fireplace, a thermal energy storage system (TESS) implemented with the fireplace and including one or more heat storing materials in which thermal energy is stored, and a control system comprising one or more controllers operatively coupled with the fireplace and the TESS. The control system is operable to control operation of the fireplace and the TESS to release the stored thermal energy from the one or more heat storing materials into a surrounding environment based on one or more inputs.

A system for providing supplemental heating to a hot water heater and an electric heat pump includes a solar thermal collector, a solar thermal storage vessel, a first water circulating system, a second water circulating system, and a controller. The first water circulating system circulates water between the solar thermal storage vessel and the solar thermal collector. The second water circulating system circulates heated water between the solar thermal storage vessel, the hot water heater, and a heat exchanger associated with the heat pump. The controller is configured to cause water circulation between the hot water heater and the solar thermal storage vessel so as to raise a temperature of water in the solar thermal storage vessel and/or in the hot water heater, and to cause circulation of heated water from the hot water heater to the heat exchanger to provide auxiliary heat for the heat pump.

A system for providing supplemental heating to a hot water heater and an electric heat pump includes a solar thermal collector, a solar thermal storage vessel, a first water circulating system, a second water circulating system, and a controller. The first water circulating system circulates water between the solar thermal storage vessel and the solar thermal collector. The second water circulating system circulates heated water between the solar thermal storage vessel, the hot water heater, and a heat exchanger associated with the heat pump. The controller is configured to cause water circulation between the hot water heater and the solar thermal storage vessel so as to raise a temperature of water in the solar thermal storage vessel and/or in the hot water heater, and to cause circulation of heated water from the hot water heater to the heat exchanger to provide auxiliary heat for the heat pump.

A controller for an electric booster element in a water heater is described. The electric booster element is powered from mains power and the controller comprises a control module and a capacitive module adapted to store power and supply stored power to the control module. The control module produces a control signal for controlling a relay to supply or restrict mains power supply to said booster element, said control signal depending at least in part on time of use data.

A controller for an electric booster element in a water heater is described. The electric booster element is powered from mains power and the controller comprises a control module and a capacitive module adapted to store power and supply stored power to the control module. The control module produces a control signal for controlling a relay to supply or restrict mains power supply to said booster element, said control signal depending at least in part on time of use data.

The present disclosure provides a computer-implemented method of modulating energy consumption by a water provision system installed in a building, the water provision system comprising a heat pump configured to transfer thermal energy from outside the building to a thermal energy storage medium inside the building and a control module configured to control operation of the water provision system, the water provision system being configured to provide water heated by the thermal energy storage medium to one or more water outlets and further configured to supply heated water to a central heating system configured to raise an indoor temperature of the building, the method being performed by the control module and comprising: determining a level of energy demands of a geographical region comprising the building; and upon determining that the level of energy demands is low, operating the heat pump to store thermal energy in the thermal energy storage medium, and operating the water provision system to supply heated water to the central heating system using thermal energy stored in the thermal energy storage medium.

The present disclosure provides a computer-implemented method of modulating energy consumption by a water provision system installed in a building, the water provision system comprising a heat pump configured to transfer thermal energy from outside the building to a thermal energy storage medium inside the building and a control module configured to control operation of the water provision system, the water provision system being configured to provide water heated by the thermal energy storage medium to one or more water outlets and further configured to supply heated water to a central heating system configured to raise an indoor temperature of the building, the method being performed by the control module and comprising: determining a level of energy demands of a geographical region comprising the building; and upon determining that the level of energy demands is low, operating the heat pump to store thermal energy in the thermal energy storage medium, and operating the water provision system to supply heated water to the central heating system using thermal energy stored in the thermal energy storage medium.