A greenhouse, for cold weather climates, is configured with a gable that is offset toward the north wall and therefore the south extension of the roof, from the gable to the south wall is longer than the north extension. A greater amount of light can enter through this south extension and the inside surface of the north wall is configured with a reflective surface to allow light to be more uniformly distributed around the plants. The north wall may have no widows and may be thermally insulated to prevent the greenhouse from getting too cold during the night. A ground to air heat transfer (GAHT) system may be configured to produce a flow of greenhouse air under the greenhouse for heat transfer, to moderate the temperature of the greenhouse. A thermal medium may flow to a thermal reservoir for heat exchange with the conduits of the GAHT system.

A heat source unit coupling system disclosed herein may include a heat medium circulation channel including a heat medium outgoing pipe and a heat medium return pipe; a water distribution channel including a water supply pipe and a hot water outlet pipe; a plurality of heat source units connected in parallel to the heat medium circulation channel and the water distribution channel; and a coupling controller communicable with each of the plurality of heat source units. Each of the plurality of heat source units may be configured to perform a space heating operation for heating a heat medium supplied from the heat medium return pipe and supplying it to the heat medium outgoing pipe; and a hot water supplying operation for heating water supplied from the water supply pipe and supplying it to the hot water outlet pipe.

A heat source unit coupling system may include a heat medium circulation channel including a heat medium outgoing pipe and a heat medium return pipe; a water distribution channel including a water supply pipe and a hot water outlet pipe; one or more multifunctional heat source units connected in parallel to the heat medium circulation channel and the water distribution channel; one or more single-function heat source units connected in parallel to the heat medium circulation channel; and a coupling controller communicable with the one or more multifunctional heat source units and the one or more single-function heat source units. The one or more multifunctional heat source units may be configured to perform a space heating operation; and a hot water supplying operation. The one or more single-function heat source units may be configured to perform the space heating operation.

Thermal network comprising at least one plant, at least one end-user location (14,15), a pipe system (11-13) and a medium contained within said pipe system (11-13) said plant and said end-user location; said end-user location(s) (14,15) being connected to the plant through the pipe system (11-13). The thermal network according to the invention is characterized in that it comprises three main pipes (11-13) that are each connected to said plant(s) and wherein the medium is in a liquid state in the first and the third main pipe (11,13), and in a gaseous state in the second main pipe (12).

A thermal management system having integrated thermal energy storage is described herein. The thermal energy storage is advantageously provided in a modular structure including a lead thermal energy storage module and one or more extension thermal energy storage modules. The lead thermal energy storage module is advantageously designed to connect, in a modular manner, with an arbitrary number of the extension thermal energy storage modules to expand the total thermal energy storage capacity of the modular thermal energy storage. Each thermal energy storage module provides nominal thermal energy storage capacity to the thermal management system such that any desired heating or cooling capacity can be provided.