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  2. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    In some areas electrical resistance heating is used, especially where the cost of electricity is low or the primary purpose is for air conditioning. Modern high-efficiency furnaces can be up to 98% efficient and operate without a chimney, with a typical gas furnace being about 80% efficient. [ 1 ]

  3. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    They are optimized for flow temperatures between 30 and 40 °C (86 and 104 °F), suitable for buildings with heat emitters sized for low flow temperatures. With losses in efficiency, an ASHP can even provide full central heating with a flow temperature up to 80 °C (176 °F). [21]

  4. Air source heat pump - Wikipedia

    en.wikipedia.org/wiki/Air_source_heat_pump

    They are optimized for flow temperatures between 30 and 40 °C (86 and 104 °F), suitable for buildings with heat emitters sized for low flow temperatures. With losses in efficiency, an ASHP can even provide full central heating with a flow temperature up to 80 °C (176 °F). [2]

  5. This Is the Best Temperature to Set a Thermostat in Summer - AOL

    www.aol.com/lifestyle/best-temperature-set...

    Just as 68 degrees F is considered the best temperature for a house in winter, experts call 78 degrees F the magic number for the summer months. This interior temperature should be amenable to ...

  6. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    A central heating system provides warmth to a ... that can use the best available pollution controls, and that is professionally operated. ... low winter temperatures ...

  7. Condensing boiler - Wikipedia

    en.wikipedia.org/wiki/Condensing_boiler

    Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.

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