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2. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   An air source heat pump ... full central heating with a flow temperature up to 80 °C (176 °F). ... unit of an air source heat pump operating in freezing conditions ...

3. Freeze stat - Wikipedia

   en.wikipedia.org/wiki/Freeze_stat

   A freeze stat is a temperature sensing device for HVAC that monitors a heat exchanger to prevent its coils from freezing. Freeze stats can be used on both refrigerant -to- air , and refrigerant -to- liquid type heat exchangers and serve different purposes with similar goals for each.

4. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   Effective immediately, American households are eligible for a tax credit to cover the costs of buying and installing a heat pump, up to $2,000. Starting in 2023, low- and moderate-level income households will be eligible for a heat-pump rebate of up to $8,000. [107] In 2022, more heat pumps were sold in the United States than natural gas furnaces.

5. Heat pump and refrigeration cycle - Wikipedia

   en.wikipedia.org/wiki/Heat_pump_and...

   Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]

6. How to Fix Your Frozen Pipes, According to Experts - AOL

   www.aol.com/keep-pipes-freezing-winter-according...

   Drastically dropping the temperature in your home between the night and day can leave your pipes more prone to freezing than they would be if you leave your heat on (anywhere over 55 degrees ...

7. 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.