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2. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   A heat pump in combination with heat and cold storage. A ground source heat pump (also geothermal heat pump) is a heating/cooling system for buildings that use a type of heat pump to transfer heat to or from the ground, taking advantage of the relative constancy of temperatures of the earth through the seasons.

3. Direct exchange geothermal heat pump - Wikipedia

   en.wikipedia.org/wiki/Direct_exchange_geothermal...

   DX system being drilled in the 1980s. A direct exchange (DX) geothermal heat pump is a type of ground source heat pump in which refrigerant circulates through copper tubing placed in the ground unlike other ground source heat pumps where refrigerant is restricted to the heat pump itself with a secondary loop in the ground filled with a mixture of water and anti-freeze.

4. Geothermal heating - Wikipedia

   en.wikipedia.org/wiki/Geothermal_heating

   A ground-source heat pump uses the shallow ground or ground water (typically starting at 10–12 °C or 50–54 °F) as a source of heat, thus taking advantage of its seasonally moderate temperatures. [15] In contrast, an air source heat pump draws heat from the air (colder outside air) and thus requires more energy.

5. Closed-loop geothermal - Wikipedia

   en.wikipedia.org/wiki/Closed-loop_geothermal

   Closed-loop geothermal systems are not to be confused with the ground source heat pumps used for small-scale, largely residential heating and cooling. While both systems use underground closed-loop circuits of working fluid, there are important differences in the depth, temperature, scale, and applications for each system:

6. How do heat pumps work? What to know about installation ... - AOL

   www.aol.com/news/heat-pumps-know-installation...

   For ductless heat pumps, the most popular in Minneapolis, it's $6,000 to $7,000 per house zone, while forced air heat pumps cost between $10,000 to $20,000, depending on the model. A traditional ...

7. Ground-coupled heat exchanger - Wikipedia

   en.wikipedia.org/wiki/Ground-coupled_heat_exchanger

   There are three configurations, a closed loop design, an open 'fresh air' system or a combination: Closed loop system: Air from inside the home or structure is blown through a U-shaped loop of typically 30 to 150 m (98 to 492 ft) of tube(s) where it is moderated to near earth temperature before returning to be distributed via ductwork ...