Device for safely performing an anti-clockwise thermodynamic Clausius-Rankine cycle with R290 as the working fluid, which is conducted in a closed, hermetically sealed working fluid circuit, having - at least one compressor for working fluid, - at least one expansion device for working fluid, - at least two heat exchangers (3, 5) for working fluid, each having at least two connections and lines for brine as heat transfer fluids (9, 10, 12, 13), - a structure with two connections and lines for brine as heat transfer fluids (9, 10), - a closed housing, - which comprises all the apparatuses connected to the closed working fluid circuit and may comprise further apparatuses, - and which is closed such that neither animals nor foreign bodies can enter it, and unauthorised persons cannot easily open it, - is further soundproof, but not gas-tight and has a small discharge opening in the lower area, characterised in that - the housing is positioned outside the structure, - the two lines (9, 10) for brine as heat exchanger fluids are routed from the housing via a space into the structure, - in that two lines (12, 13) for brine as heat exchanger fluids are routed out of the housing above the ground from the housing to the heat source (14, 16). - a double-walled condenser is provided, the leakage gap of which is connected to a degasser, and - the degasser is ventilated inside the housing. - at least one compressor for working fluid, - at least one expansion device for working fluid, - at least two heat exchangers (3, 5) for working fluid, each having at least two connections and lines for brine as heat transfer fluids (9, 10, 12, 13), - a structure with two connections and lines for brine as heat transfer fluids (9, 10), - a closed housing, - which comprises all the apparatuses connected to the closed working fluid circuit and may comprise further apparatuses, - and which is closed such that neither animals nor foreign bodies can enter it, and unauthorised persons cannot easily open it, - is further soundproof, but not gas-tight and has a small discharge opening in the lower area, characterised in that - the housing is positioned outside the structure, - the two lines (9, 10) for brine as heat exchanger fluids are routed from the housing via a space into the structure, - in that two lines (12, 13) for brine as heat exchanger fluids are routed out of the housing above the ground from the housing to the heat source (14, 16). - a double-walled condenser is provided, the leakage gap of which is connected to a degasser, and - the degasser is ventilated inside the housing. - which comprises all the apparatuses connected to the closed working fluid circuit and may comprise further apparatuses, - and which is closed such that neither animals nor foreign bodies can enter it, and unauthorised persons cannot easily open it, - is further soundproof, but not gas-tight and has a small discharge opening in the lower area, - the housing is positioned outside the structure, - the two lines (9, 10) for brine as heat exchanger fluids are routed from the housing via a space into the structure, - in that two lines (12, 13) for brine as heat exchanger fluids are routed out of the housing above the ground from the housing to the heat source (14, 16). - a double-walled condenser is provided, the leakage gap of which is connected to a degasser, and - the degasser is ventilated inside the housing.