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2. Infrared heater - Wikipedia

   en.wikipedia.org/wiki/Infrared_heater

   Quartz heater. Quartz tungsten infrared heaters emit medium wave energy reaching operating temperatures of up to 1,500 °C (2,730 °F) (medium wave) and 2,600 °C (4,710 °F) (short wave). They reach operating temperature within seconds.

3. These Electric Fireplaces Will Turn Your Home Into a Cozy ...

   www.aol.com/turn-home-cozy-winter-retreat...

   $114.99 at amazon.com. Klaus Electric Fireplace Insert. If you have a mantel but no working chimney, your best bet for a cozy fire this winter is to invest in an electric fireplace insert.

4. 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 ...

5. 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.

6. Ionospheric heater - Wikipedia

   en.wikipedia.org/wiki/Ionospheric_heater

   Platteville Atmospheric Observatory, Colorado, USA (stopped ionospheric heater research in 1984 but still operates as an atmospheric observatory). SPEAR (Space Plasma Exploration by Active Radar) [ 5 ] is an installation operated by UNIS (the University Centre in Svalbard ) adjacent to the EISCAT facilities at Longyearbyen in Svalbard , Norway ...

7. Gas heater - Wikipedia

   en.wikipedia.org/wiki/Gas_heater

   A gas heater is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane, or butane. Indoor household gas heaters can be broadly categorized in one of two ways: flued or non-flued, or vented and unvented .