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Heat pump is the refrigerating appliance that collects the heat from the outside and concentrates it inside the heating system of the house or building. For every unit of energy used by a ground source heat pump, a well-designed geothermal system can provide three to four units of heat energy to the building. Just 1 kW of power plant energy produces 4 kW of heat energy, and in some cases even more, for example, for house space heating of 100 m2 Heat Pump consumes only 2 to 3 kW of electrical power.  Heating systems based on Heat Pumps are in use since early twentieth century. First Heat Pumps were installed in 1932. in Tokyo (Japan). Heat pumps are also used in Zurich (Switzerland) for heating purposes of City Hall since 1938. Today millions of Heat Pumps are used for heating of houses and buildings all across Europe, Canada and United States. Systems based on Heat pumps are the most promising among all other alternative heating (and cooling) systems. It is the only system that produces more energy than it has received.
Governments of European Union supports the use of alternative and renewable sources of energy (with Heat Pumps in the first place) for those common reasons: - Huge energy savings.
- Environmental protection.
- Independent energy production in compare to other imported energy sources such as natural gas and oil.
- No risks of conflagration.
National program of Serbian Government for energy efficiency and savings supports and promotes the use of Heat Pumps.
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