The amount of electricity used by a heat pump depends on a variety of factors, including the size and efficiency of the heat pump, the temperature difference between the inside and outside of the building, and the amount of time that the heat pump is in use.

In general, heat pumps are more energy-efficient than traditional heating systems that rely on burning fossil fuels. This is because they move heat from one place to another, rather than generating heat through combustion.

The amount of electricity used by a heat pump can be measured in terms of its coefficient of performance (COP), which is the ratio of heat output to electrical energy input. For example, a heat pump with a COP of 3 would provide three units of heat for every one unit of electrical energy input.

The COP of a heat pump can vary depending on the temperature outside and the temperature inside the building. In colder temperatures, a heat pump may need to work harder to extract heat from the outside air or ground, which can reduce its COP and increase its electricity usage.

Overall, the electricity usage of a heat pump will depend on a variety of factors, and it is important to choose a properly sized and efficient unit, as well as maintaining it properly, to ensure the most energy-efficient operation possible.