Absorption heat pumps use an ammonia-water absorption cycle, rather than a vapor-compression cycle, to transfer heat. Ammonia could be the refrigerant, and h2o would be the absorber. The ammonia condenses at one of the technique’s coils to launch heat and evaporates at the opposite coil to soak up heat. In https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/