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  2. Furnace (central heating) - Wikipedia

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

    A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as compared to a mid-efficiency forced-air or forced-draft furnace, is the capture of latent heat from the exhaust gases in the secondary heat exchanger.

  3. Gas heater - Wikipedia

    en.wikipedia.org/wiki/Gas_heater

    A flued heater that burns wood for heat. Any byproducts leave through the flue pipe in the back. Flued heaters are permanently installed wherever they are placed. The flue, if properly installed with the correct overall height, size, and orientation should extract all of the heater emissions. A correctly operating flued gas heater is typically ...

  4. That’s Fall, Folks! Get Ready for Chilly Nights With These ...

    www.aol.com/best-patio-heaters-beat-chill...

    To get heat almost instantly, just mount this patio heater on a wall or ceiling then plug it into a 120-volt outlet. Three are three different heating modes, which are controlled by remote.

  5. Space heater - Wikipedia

    en.wikipedia.org/wiki/Space_heater

    These heaters are often designed such that the frequency of the emitted waves are in the infrared part of the electromagnetic spectrum. The materials used in radiant heaters can vary. Halogen heaters have tungsten filaments in sealed quartz envelopes, mounted in front of a metal reflector in a plastic case. They operate at a higher temperature ...

  6. This space heater has 45,000 five-star reviews and it's just $27

    www.aol.com/lifestyle/givebest-space-heater-sale...

    Compact, this ceramic space heater measures in at 7.9 x 6.2 x 10.2 inches but with two heat levels of 1500 or 750 watts, this space heater is powerful enough to keep a small room cozy.

  7. Industrial furnace - Wikipedia

    en.wikipedia.org/wiki/Industrial_furnace

    An industrial furnace, also known as a direct heater or a direct fired heater, is a device used to provide heat for an industrial process, typically higher than 400 degrees Celsius. [1] They are used to provide heat for a process or can serve as reactor which provides heats of reaction. Furnace designs vary as to its function, heating duty ...