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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. List of Amazon products and services - Wikipedia

   en.wikipedia.org/wiki/List_of_Amazon_products...

   In March 2014, Amazon announced an increase in the annual membership fee for Amazon Prime, from $79 to $99 for customers in the United States. [14] [21] Shortly after this change, Amazon announced Prime Music, a service in which members can get unlimited, ad-free streaming of over a million songs and access to curated playlists. [22]

4. Hydronics - Wikipedia

   en.wikipedia.org/wiki/Hydronics

   In the oldest modern hydronic heating technology, a single-pipe steam system delivers steam to the radiators where the steam gives up its heat and is condensed back to water. The radiators and steam supply pipes are pitched so that gravity eventually takes this condensate back down through the steam supply piping to the boiler where it can once ...

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Electrical heaters are often used as backup or supplemental heat for heat pump systems. The heat pump gained popularity in the 1950s in Japan and the United States. [14] Heat pumps can extract heat from various sources, such as environmental air, exhaust air from a building, or from the ground. Heat pumps transfer heat from outside the ...

6. 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.

7. Amazon Prime - Wikipedia

   en.wikipedia.org/wiki/Amazon_Prime

   Amazon Prime electric delivery vans in north London. In 2005, Amazon announced Amazon Prime as a membership service offering free two-day shipping within the contiguous United States on all eligible purchases for an annual fee of $79 (equivalent to $127 in 2024) [4] and discounted one-day shipping rates. [5]

8. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   An air source heat pump (ASHP) is a heat pump that can absorb heat from air outside a building and release it inside; it uses the same vapor-compression refrigeration process and much the same equipment as an air conditioner, but in the opposite direction. ASHPs are the most common type of heat pump and, usually being smaller, tend to be used ...

9. Radiant heating and cooling - Wikipedia

   en.wikipedia.org/wiki/Radiant_heating_and_cooling

   In buildings, the radiant heat flow between two internal surfaces (or a surface and a person) is influenced by the emissivity of the heat emitting surface and by the view factor between this surface and the receptive surface (object or person) in the room. [38] Thermal (longwave) radiation travels at the speed of light, in straight lines. [9]