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2. Cold district heating - Wikipedia

   en.wikipedia.org/wiki/Cold_district_heating

   The annual performance factor of heat pumps is also relatively high, especially compared to air-sourced heat pumps. A study of 40 systems commissioned up to 2018 showed that the heat pumps achieved an seasonal COP of at least 4 for the majority of the systems studied; the highest seasonal COP values were about 6. [1]

3. Winter Heating: How To Choose the Best System for Your ... - AOL

   www.aol.com/finance/winter-heating-choose-best...

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4. Seasonal energy efficiency ratio - Wikipedia

   en.wikipedia.org/wiki/Seasonal_energy_efficiency...

   "Cold climate" heat pumps are designed to optimize efficiency below 0 °F (−18 °C). As of 2023 heat pumps are marketed that will extract heat from outdoor temperatures as low as −40 °F (−40 °C). In the case of cold climates, water or ground-source heat pumps are often the most efficient solution.

5. 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 ...

6. 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]

7. Drones banned over 'critical infrastructure' sites in New ...

   www.aol.com/drones-banned-over-critical...

   “At the request of federal security partners, the FAA published 22 Temporary Flight Restrictions prohibiting drone flights over critical New Jersey infrastructure,” the agency released in a ...