Even when it’s chilly outdoors, there’s plenty of heat in the outside air to supply enough heating. Since heat pumps just shift heat out and in of the home according to the year, they don’t involve fossil fuels like normal fuel to produce heat. This would make them energy effective https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/