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  2. The Best Portable Heaters Will Warm Any Room of the House - AOL

    www.aol.com/lifestyle/warm-room-house-best...

    The GiveBest Portable Electric Space Heater is a versatile device well suited to the average household’s needs. Its compact design and user-friendly controls make it a great go-to, portable ...

  3. Electric heating - Wikipedia

    en.wikipedia.org/wiki/Electric_heating

    The heating element inside every electric heater is an electrical resistor, and works on the principle of Joule heating: an electric current passing through a resistor will convert that electrical energy into heat energy. Most modern electric heating devices use nichrome wire as the active element; the heating element, depicted on the right ...

  4. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    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 2.3 to 3.5. [4]

  5. Space heater - Wikipedia

    en.wikipedia.org/wiki/Space_heater

    In the United States, Underwriters Laboratories' UL 1278 [11] (for portable electric space heaters) and UL 1042 [12] standards (for portable and fixed baseboard electric heaters) certify heater safety. Although the General Services Administration had Specification W-H-193 [13] for

  6. Furnace (central heating) - Wikipedia

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

    By comparison, most modern "warm air" furnaces typically use a fan to circulate air to the rooms of house and pull cooler air back to the furnace for reheating; this is called forced-air heat. Because the fan easily overcomes the resistance of the ductwork, the arrangement of ducts can be far more flexible than the octopus of old.

  7. Oil heater - Wikipedia

    en.wikipedia.org/wiki/Oil_heater

    All electrically resistant heaters are 100% efficient at converting incoming electric energy into heat. However, since most of an oil heater's main electricity is produced by coal, oil, or gas generators with ~30% efficiency, electric heat is often less efficient and more expensive than combustion heaters (which directly convert oil or gas to ...

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