Heat pumps work by taking heat from outside your home and using it to warm the inside. The outside heat, or thermal energy, can come from the air or underground. Even in cooler seasons there’s heat in both these sources.
The pump uses electricity to take the outside heat, passing it over a refrigerant, and warming it before moving it around the property. The pump delivers more energy to the heating system than it uses during the heating process, making it an efficient technology.
More electricity will be used by the pump during the heating stage if the outside source temperature is low. When the outside source is warmer, less electricity is needed to heat it up.