The present invention relates to an arrangement (10) for a merchandise display system. The arrangement comprises a detector (5) arranged to detect the presence of a person (8) in the proximity of a display region (2) adapted to accommodate a piece of merchandise (3), a temperature adjustment device (4) arranged to adjust the temperature in the proximity of the display region, and a controller (6) configured to, based on the detection, control the temperature adjustment device. The present invention is advantageous in that the temperature difference may contribute to how the piece of merchandise is perceived by the person.

A method, system or computer usable program product for controlling an on-demand hot water heater including providing a plurality of nodes for receiving hot water from an on-demand hot water heater in a hot water delivery system, receiving a demand with a node identifier for hot water at a node, determining a hot water temperature for the node from a centralized database, the database including a set of node identifiers with a corresponding set of preset hot water temperatures, and controlling a temperature of hot water flowing from the water heater based on the determined hot water temperature.

A auxiliary power (AP) input switch includes at least a line power-in terminal, a switched power out terminal, an AC power entry receptacle and a switch actuating element that is switched to an on state to make a connection between the line power-in terminal and the switched power-out terminal, and is switched to an off state to break the connection between line power-in terminal and the switched power-out terminal and to make a connection between the AC power entry receptacle and to the switched power-out terminal. The auxiliary power (AP) input switch that is used as or to replace an emergency cut-off switch for an electrically-driven system, such as a heating system, air conditioning system, refrigeration system, etc., without limitation.

A auxiliary power (AP) input switch includes at least a line power-in terminal, a switched power out terminal, an AC power entry receptacle and a switch actuating element that is switched to an on state to make a connection between the line power-in terminal and the switched power-out terminal, and is switched to an off state to break the connection between line power-in terminal and the switched power-out terminal and to make a connection between the AC power entry receptacle and to the switched power-out terminal. The auxiliary power (AP) input switch that is used as or to replace an emergency cut-off switch for an electrically-driven system, such as a heating system, air conditioning system, refrigeration system, etc., without limitation.

Provided is a method for controlling a cascade boiler system, and the method includes a) operating the number of boilers set in an initial operation state, b) detecting a supply water temperature and a returned water temperature of the primary side of the hydro-separator and a supply water temperature and a returned water temperature of the secondary side, and calculating a flow rate corrected by the hydro-separator using the detected temperatures, c) calculating a set temperature serving as the supply water temperature of the primary side that is able to maintain the supply water temperature of the secondary side when the supply water temperature of the secondary side is within a set range of a target temperature while maintaining the initial operation state, and d) calculating the number of boilers that are able to maintain the calculated set temperature, and controlling an operation of the boilers according to the number.

A water heater system includes an intermediate water heater having a storage tank in which water is initially received at an initial temperature. The intermediate water heater is controllable to heat the water to an intermediate temperature that is higher than the initial temperature. The water heater system also includes at least one point-of-use water heater coupled to the intermediate water heater for receiving the water from the intermediate water heater after the water has been heated to the intermediate temperature. The point-of-use heater is controllable to heat the received water to a point-of-use temperature, the point-of-use temperature being higher than the intermediate temperature.

A method and apparatus to electronically sense air flow and close a switch when air flow is adequate to operate an electric heater, HVACR system, or other apparatus. The apparatus is more reliable than electro-mechanical devices often used for this purpose.

Provided is a heating device for a hot water mat that can minimize noise by a check valve for controlling flow of liquid. The heating device for a hot water mat includes: a water tank having a tub for keeping liquid and a discharge hole formed through a side of a lower portion to discharge the liquid in the tub; a heating module connected to the discharge hole and heating liquid; a separator disposed in the water tank, dividing the tub in to a first compartment at a lower portion and a second compartment at an upper portion, and having a connection hole for connecting the first compartment and the second compartment to each other; and a check valve disposed in the first compartment and opening and closing the connection hole by moving up and down by buoyancy from the liquid in the first compartment.

A hydraulic manifold for a hydraulic heating and/or cooling system includes a feed conduit (212) and a return conduit (216). The feed conduit (212) includes at least one feed connection (258), and the return conduit (216) includes at least one return connection (260), for the connection of a load circuit (228). A load module (204), in which a section of the feed conduit (212) with the feed connection (258), and a section of the return conduit (216) with the return section (260) are formed, includes at least one mixing device with a pump (232) and with a regulating valve (230), to admix fluid from the return connection (260) to a fluid flow from the feed conduit (212) to the feed connection (258). The section of the feed conduit (212) and the return conduit (216) in each case include an additional contact for connection with a further load module.

A system for producing a heat source for heating or electricity, using medium/low-temperature waste heat includes: an absorption-type heat pump (100) supplied with a driving heat source and heat source water to heat a low-temperature heat medium; a regenerator heat exchange unit (210) for supplying a regenerator (110) with a driving heat source using waste heat; an evaporator heat exchange unit (220) for supplying an evaporator with heat source water; a heat medium circulation line (310) for circulating a heat medium; a generation unit (400) branching off from the heat medium circulation line (310) and producing electricity; a heat production unit (500) branching off from the heat medium circulation line (310) and supplying a heat-demanding place with a heat source for heating; and a switching valve unit (600) for controlling the flow of heat medium supplied the generation unit (400) or the heat production unit (500).