Absorption heat pumps use an ammonia-h2o absorption cycle, rather than a vapor-compression cycle, to transfer heat. Ammonia will be the refrigerant, and drinking water would be the absorber. The ammonia condenses at on the list of method’s coils to release heat and evaporates at another coil to absorb heat. Study https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/