A single potential downside of using a fuel absorption heat pump would be the initial cost, as it could be costlier to setup in comparison with regular electric heat pumps. Furthermore, they will not be suitable for all climates and will involve normal servicing to be certain optimum general performance. https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/