Established preferred temperatures: Change the thermostat to the specified temperatures for heating and cooling in your home. The temperature underground stays continuous below about six ft deep, regardless of the time. A geothermal heat pump can take advantage of this constant heat working with liquid-stuffed pipes—known as a “loop”—buried underground. https://purethermal.co.uk/media-news/can-gas-absorption-heat-pumps-provide-an-alternative-heat-pump-option-in-2025/