The disclosed technology includes an integrated system including a space conditioning system, a liquid heating system, and a controller. The space conditioning system can include a refrigerant circuit fluidly connecting a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, an expansion valve, and a reversing valve such that refrigerant can flow through the circuit. The liquid heating system can include a liquid heating device and a liquid circuit configured to direct liquid from the liquid heating device through the first heat exchanger. The controller can be in electrical communication with the space conditioning system and the liquid heating system. The controller can be configured to determine a demand of the space conditioning system and the liquid heating system, and in response, output instructions to a plurality of valves to direct the refrigerant through the refrigerant circuit and direct the liquid through the liquid circuit.

A combination boiler provides heated water to a boiler loop and heated domestic hot water (DHW) to a DHW loop. A primary heat exchanger is connected to the boiler loop. A burner provides heat to the primary heat exchanger and an input fan supplies a fuel and air mixture to the burner. A secondary heat exchanger transfers heat energy from the boiler loop to a domestic water loop. A controller determines a boiler loop flow rate. The controller measures an input temperature of the boiler loop, an output temperature of the boiler loop, and a DHW output temperature of the domestic water loop. The controller determines a DHW input temperature and estimates a DHW flow rate. The input fan speed is initiated or operated according to a required heat output of the burner corresponding to the DHW flow rate.

A heat pump system includes a compressor coupled to a first variable speed motor, a first heat exchanger, a geothermal heat exchanger, a fan coupled to a second variable speed motor, and an expansion device. The heat pump system also includes a refrigerant loop which fluidly couples the compressor, the geothermal heat exchanger, the expansion device, and the first heat exchanger. The heat pump system also includes a controller configured to adjust a first speed of the first variable speed motor, a second speed of the second variable speed motor, and an operation of the expansion device based upon a thermal energy demand.

The disclosed technology includes an integrated system including a space conditioning system, a liquid heating system, and a controller. The space conditioning system can include a refrigerant circuit fluidly connecting a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, an expansion valve, and a reversing valve such that refrigerant can flow through the circuit. The liquid heating system can include a liquid heating device and a liquid circuit configured to direct liquid from the liquid heating device through the first heat exchanger. The controller can be in electrical communication with the space conditioning system and the liquid heating system. The controller can be configured to determine a demand of the space conditioning system and the liquid heating system, and in response, output instructions to a plurality of valves to direct the refrigerant through the refrigerant circuit and direct the liquid through the liquid circuit.

Disclosed herein is a heat exchanger apparatus comprising a heat exchanger tube having an inlet valve and an outlet valve. When the valves are open, the refrigerant can flow through the heat exchanger tube, and when the valves are closed, refrigerant can be stored in the heat exchanger tube, thereby reducing the effective heat exchange surface area of the heat exchanger apparatus.

A local energy distributing system includes a local feed conduit; a local return conduit; a central heat exchanger connected to a heating grid having a feed conduit for an incoming flow of heat transfer fluid having a first temperature in the range of 50-120° C., and a return conduit for a return flow of heat transfer fluid having a second temperature, the second temperature being lower than the first temperature, wherein the central heat exchanger is configured to exchange heat from the incoming flow of heat transfer fluid to an outgoing flow of local heat transfer fluid in the local feed conduit. The system also includes a plurality of local heating systems, each having an inlet connected to the local feed conduit and an outlet connected to the local return conduit, wherein each local heating system is configured to provide hot water and/or comfort heating to a building.

A hot water tank including: a shell enclosing a chamber containing a heat exchange liquid, the shell including a base, side wall and lid; a cold water inlet connected to a first end of a heat exchanger, and a hot water outlet connected to a second end of the heat exchanger, wherein the heat exchanger is located in an upper portion of the chamber; a primary heating element connected to a power source for heating the heat exchange liquid, the primary heating element being located in a lower portion of the chamber.

Liner device, adapted to be mounted between a burner box and a tube interface plate of a furnace. The liner device includes a base section, one or more tube sections, and one or more angle fasteners. The base section includes a shielding layer formed from a first flexible mesh of flame-resistant fibers, the shielding layer defining a first surface that is configured to face the burner box, a second surface opposite to the first surface, and a medial region with a through-hole forming a passageway through the shielding layer. The tube section is composed essentially of a second flexible mesh of flame-resistant fibers formed into a tubular shape that defines an internal channel around a nominal axis. A proximal end of the tube section is positioned at the base section, such that the channel opens into the through-hole and that the tube section projects from the second surface and in a direction faced by the second surface. The angle fastener has a base portion that is positioned along and fixed to the second surface of the shielding layer. The angle fastener further has a leg portion that projects towards the second direction and is positioned along and fixed to an outer surface of the tube section at or near the proximal end thereof.

A fluid transportation network (1) comprises a plurality of parallel zones (Z1, Z2), fed by a common supply line (L), with a regulating zone valve (V1, V2) in each zone (Z1, Z2) for regulating a flow of fluid (ϕ.sub.1, ϕ.sub.2) through the respective zone (Z1, Z2). A processing unit (RE) receives valve positions (pos.sub.1, pos.sub.2) of the regulating zone valves (V1, V2) and determines and sets an adjusted valve position for a line valve (VE) arranged in the supply line (L), depending on the valve positions (pos.sub.1, pos.sub.2) of the regulating zone valves (V1, V2). A processing unit (RE) further receives a measurement of a total flow of fluid (ϕ.sub.tot) through the supply line (L) and determines and sets adjusted valve positions for the regulating zone valves (V1, V2), depending on the measurement of the total flow of fluid (ϕ.sub.tot) through the supply line (L).

An instant hot water delivery system includes a thermal storage bin that receives hot water from a water heater via a hot water supply conduit and stores the hot water therein. The thermal storage bin is disposed adjacent a point of demand to deliver the hot water instantly to the point of demand responsive to a demand. The thermal storage bin is configured to retain a thermal energy of the hot water for a prolonged period using a phase change material. When the hot water stored in the thermal storage bin cools down below a threshold temperature, the cooled down hot water is recirculated to the water heater via a cold water supply conduit using a crossover valve. The recirculation is based on thermosiphon. Fresh hot water from the water heater replaces the cooled down hot water that is displaced from the thermal storage bin.