Even if it’s cold outdoors, there’s adequate heat in the skin air to deliver adequate heating. Because heat pumps merely move heat in and out of the house based on the period, they don’t demand fossil fuels including organic gas to make heat. This tends to make them Power efficient https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/