There is described an apparatus for storing heat. The apparatus comprises a thermal mass for storing heat, the thermal mass having a first surface and a second surface. Fins are provided on the first surface and the second surface for accelerating heat transfer to and from the thermal mass. A displacement mechanism is secured to the thermal mass for translating the first surface to a first environment, e.g., a duct, while removing the second surface and its fins from a second environment, e.g., outside, and for translating the second surface to the second environment while removing the first surface and its fins from the first environment.

A water heater includes a heat exchanger, a heat pump, a first valve in fluid communication with the heat exchanger and the heat pump, and a controller configured to control the first valve. The first valve can be configured to direct water flow toward at least one of the gas heater or the electric heat pump. A second valve in fluid communication with the first valve and the heat pump can be provided, and the controller can be further configured to control the second valve. A water heater inlet and a water heater outlet can be included and in fluid communication with the first valve, and the controller can be configured to monitor a temperature of water entering the water heater inlet and control the first valve dependent upon the monitored temperature.

An electric radiator is provided. The electric radiator includes: a housing provided with an air channel cover therein; a heating assembly disposed in the housing and defining a natural convection air channel with the air channel cover, an air supply inlet being formed at a first end of the natural convection air channel and an air supply outlet being formed at a second end of the natural convection air channel above the air supply inlet, air in the natural convection air channel being heated by the heating assembly to form a natural convection in the natural convection air channel; a mesh hood mounted onto a front surface of the housing and covering the heating assembly and the air supply outlet; a first temperature limiter mounted onto the heating assembly and adjacent to the air supply outlet in an up-down direction.

A water heater includes a water tank and a flow-through heating element. The water tank contains heated water. The flow-through heating element is located in the lower portion of the water tank and heats water as water is passed through an interior channel of the heating element. In another configuration, the water heater further includes a recirculation line and the heating element further includes an input end external of the water tank to receive water to be heated and an output end to output heated water into the water tank. The recirculation line transports water from the water tank to the input end of the heating element that is external of the water tank.

A hot water mat according to the present invention comprises: a boiler part including a tank in which water is stored and a heater for heating the water; a mat part including a flow channel for circulating the water supplied from the tank; and a sterilization part for generating a sterilizing material from the water in order to kill germs contained in the water.

A system is provided for cooling the heat generated by a miner, the system includes a liquid cooling chassis comprising a miner and a dielectric fluid enclosure and a water tank kit for storing water, the water tank kit includes a coil with said dielectric fluid, wherein the heat generated from said miner is transferred to the water stored in said water tank kit by pumping the heated dielectric fluid from the liquid cooling chassis into the coil in the water tank kit to produce a heat source thereof.

A heating device having a holding apparatus to accommodate a control unit, the holding apparatus having a receiving part. The receiving part has at least two struts, and a receptacle for the control unit is developed between the at least two struts. A holding apparatus for a heating device is also described.

A water heater including a tank, first and second heating elements, first and second temperature sensors, a communication module, and a controller. The controller is operable to determine a first temperature value related to a first temperature sensed by the first temperature sensor, determine a second temperature value related to a second temperature sensed by the second temperature sensor, and receive a command from the external controller. When the received command is a first command, the controller control current to the first heating element based on the first temperature value traversing a first set point, and controls current to the second heating element based on the second temperature value traversing a second set point. When the received command is a second command, the controller controls current only to the first heating element and not the second heating element, the control being based on the first temperature value.

A laser tool system, which includes an optical fiber having an input end and an output end and a laser tool body, is described. The output end of the optical fiber may be optically connected to a laser source. The laser tool body may include a laser head optically connected to the laser output end, an activating chamber connected to the laser head, a heat transfer agent, an exit port, a nozzle connected to the exit port, and a fluid conduit. The fluid conduit may deliver a fluid into contact with the heat transfer agent. Methods for heating an aqueous fluid and heating a fluid in a reservoir are also described. The methods may include irradiating a heat transfer agent to provide an irradiated heat transfer agent, providing a fluid, and contacting the irradiated heat transfer agent with the fluid, thereby heating the fluid and forming a heated fluid mixture.

A water heater includes a heat exchanger, a heat pump, a first valve in fluid communication with the heat exchanger and the heat pump, and a controller configured to control the first valve. The first valve can be configured to direct water flow toward at least one of the gas heater or the electric heat pump. A second valve in fluid communication with the first valve and the heat pump can be provided, and the controller can be further configured to control the second valve. A water heater inlet and a water heater outlet can be included and in fluid communication with the first valve, and the controller can be configured to monitor a temperature of water entering the water heater inlet and control the first valve dependent upon the monitored temperature.