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