What is a heat pump?

Heat pumps require electricity for operation, however, the consumption is significantly lower compared to room heating with traditional electricity powered furnaces. A heat pump would only require approx. 30% of electricity in order to heat an identical room, because the remaining part of energy, required to heat the water in heating devices installed in the house, is generated from underground water (water-water heat pump), ground (ground-water heat pump) or air (air-water heat pump). Generation of heat from underground water, ground or air is completely impossible for those who already forgot what they were taught about physics in primary and secondary schools. This is actually a simple thermodynamic process extracting heat from the environment (underground water, ground or air).