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2. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   In general, heat pumps work most efficiently (that is, the heat output produced for a given energy input) when the difference between the heat source and the heat sink is small. When using a heat pump for space or water heating, therefore, the heat pump will be most efficient in mild conditions, and decline in efficiency on very cold days.

3. Seasonal thermal energy storage - Wikipedia

   en.wikipedia.org/wiki/Seasonal_thermal_energy...

   A ground source heat pump is used in winter to extract the warmth from the Thermal Bank to provide space heating via underfloor heating. A high Coefficient of performance is obtained because the heat pump starts with a warm temperature of 25 °C (77 °F) from the thermal store, instead of a cold temperature of 10 °C (50 °F) from the ground. [17]

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

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

   A heat pump provides cool air in the summer and heat in winter. In cooling mode, a heat pump works like a refrigerator, using a refrigerant to cool hot air pulled from outdoors.

5. 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.

6. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   An air source heat pump can be used to air condition the building during hot weather, and to warm the building using heat extracted from outdoor air in cold weather. Air-source heat pumps are generally uneconomic for outdoor temperatures much below freezing. In colder climates, geothermal heat pumps can be used to extract heat from the ground ...

7. 5 Signs That It's Time to Turn on the Heat for Winter ... - AOL

   www.aol.com/lifestyle/5-signs-time-turn-heat...

   Whether you have a furnace or electric heat, knowing the right time to turn your heat on may prolong the system's life, prevent damage (like frozen pipes), and optimize energy efficiency. 1 ...