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