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  2. 180 Fun Morning Meeting Questions for Kids to Express ... - AOL

    www.aol.com/180-fun-morning-meeting-questions...

    From silly and funny open-ended questions to more thought-provoking inquiries, these 180 morning meeting questions provide ideas on a variety of topics for various age groups.

  3. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    Peter von Rittinger develops and builds the first heat pump. [15] 1877 In the period before 1875, heat pumps were for the time being pursued for vapour compression evaporation (open heat pump process) in salt works with their obvious advantages for saving wood and coal. In 1857, Peter von Rittinger was the first to try to implement the idea of ...

  4. 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 ...

  5. Renewable heat - Wikipedia

    en.wikipedia.org/wiki/Renewable_heat

    Hot Springs located in Nevada. Geothermal energy is accessed by drilling water or steam wells in a process similar to drilling for oil. Geothermal energy is an enormous, underused heat and power resource that is clean (emits little or no greenhouse gases), reliable (average system availability of 95%), and homegrown (making populations less dependent on oil).

  6. Ground source heat pump - Wikipedia

    en.wikipedia.org/wiki/Ground_source_heat_pump

    These heat pumps are also preferred for pool heating. Heat pumps typically only heat water to about 55 °C (131 °F) efficiently, whereas boilers typically operate at 65–95 °C (149–203 °F) [citation needed]. The size of radiators designed for the higher temperatures achieved by boilers may be too small for use with heat pumps, requiring ...

  7. “Over 100 Years Old”: 61 Long-Lasting Products That These ...

    www.aol.com/lifestyle/over-100-years-old-61...

    Image credits: Nates94 #25 Speed Queen Tr7 Dr7. Buy Once, Cry Once. Beyond happy with our new purchase. We were tired of our washer and dryer having problems despite only being a few years old.