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