Absorption heat pumps use an ammonia-drinking water absorption cycle, in lieu of a vapor-compression cycle, to transfer heat. Ammonia is the refrigerant, and water would be the absorber. The ammonia condenses at on the list of system’s coils to release heat and evaporates at one other coil to soak up https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/