Set preferred temperatures: Regulate the thermostat to the desired temperatures for heating and cooling in your house. Ammonia is harmful but has zero GWP. Packaged GAHPs continue to keep the ammonia circuit outdoor or in mechanical rooms for each code with appropriate ventilation and, where demanded, leak detection. Abide by https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/