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In the search for the best propane heat pump, dozens of combinations of components have been tested by the Fraunhofer Institute for Solar Energy Systems.
November 10, 2022 Europe Heat pumps

Fraunhofer Researchers Say Low-Charge Propane Heat Pump Sets Efficiency Record

The heat pump generated 12.8kW (3.6TR) of heating capacity with only 124g (4.4oz) of R290.

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Germany R290 Heat Pumps
October 27, 2020 Europe Heating & Ventilation

German Project Developing Compact Circuit for R290 Heat Pumps

Preliminary work achieved a 75% reduction in refrigerant charge.

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