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2. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   Specifically, the heat pump transfers thermal energy using a heat pump and refrigeration cycle, cooling the cool space and warming the warm space. [1] In winter a heat pump can move heat from the cool outdoors to warm a house; the pump may also be designed to move heat from the house to the warmer outdoors in summer.

3. Coefficient of performance - Wikipedia

   en.wikipedia.org/wiki/Coefficient_of_performance

   The COP usually exceeds 1, especially in heat pumps, because instead of just converting work to heat (which, if 100% efficient, would be a COP of 1), it pumps additional heat from a heat source to where the heat is required. Most air conditioners have a COP of 3.5 to 5. [3]

4. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   This is partly because ice forms on the outdoor unit's heat exchanger coil, which blocks air flow over the coil. To compensate for this, the heat pump system must temporarily switch back into the regular air conditioning mode to switch the outdoor evaporator coil back to the condenser coil, to heat up and defrost. Therefore, some heat pump ...

5. 25 of the best Walmart sales of the week: Apple gadgets ... - AOL

   www.aol.com/lifestyle/the-best-walmart-sales-of...

   $20 $30 Save $10 Slice, dice, chop and grate to your heart's content with this seven-piece cutlery set in a pleasing color palette. This set comes with six stainless steel chef's knives and a pair ...

6. Ground source heat pump - Wikipedia

   en.wikipedia.org/wiki/Ground_source_heat_pump

   [50] [47] [49] The payback period for larger commercial systems in the US is 1–5 years, even when compared to natural gas. [47] Additionally, because geothermal heat pumps usually have no outdoor compressors or cooling towers, the risk of vandalism is reduced or eliminated, potentially extending a system's lifespan. [51]

7. LG - Wikipedia

   en.wikipedia.org/wiki/LG

   LG Corporation is a holding company that operates worldwide through more than 30 companies in the electronics, chemical, and telecom fields. Its electronics subsidiaries manufacture and sell products ranging from electronic and digital home appliances to televisions and mobile telephones, from thin-film-transistor liquid-crystal displays to ...