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2. Is It Cheaper To Run Space Heaters Or Central Heat? - AOL

   www.aol.com/cheaper-run-space-heaters-central...

   Consumer Reports’ lab engineers tested more than 90 space heaters and found that the highest-rated models can heat an average-sized room (200 square feet) in about 15 minutes, with individual ...

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

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

   Equipped with PTC technology, this tiny heater is both efficient and energy-saving. It quietly heats up in seconds and gets as hot as 176 degrees. Plus, that color is exceptionally vintage-looking ...

4. These Editor-Tested Space Heaters Will Keep You Toasty All ...

   www.aol.com/lifestyle/best-space-heaters-warming...

   Most of these space heaters have a fan, but a few primitive ones do not. Ideal use : A better and quieter alternative to an electric coil fan heater. These are great for shared offices or wherever ...

5. Space heater - Wikipedia

   en.wikipedia.org/wiki/Space_heater

   Combustion space heaters convert chemical energy into heat through combustion of a fuel. These heaters often do not require electricity to function and can therefore be used off-the-grid. Honeywell electric infrared radiant heater Sunbeam quartz space heater uses quartz tubing for infrared heating

6. Ceramic heater - Wikipedia

   en.wikipedia.org/wiki/Ceramic_heater

   A ceramic heater as a consumer product is a space heater that generates heat using a heating element of ceramic with a positive temperature coefficient (PTC). [1] [2] [failed verification] Ceramic heaters are usually portable and typically used for heating a room or small office, and are of similar utility to metal-element fan heaters.

7. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   Ground-source heat pumps (GSHPs)—or geothermal heat pumps (GHP), as they are commonly termed in North America—are among the most energy-efficient technologies for providing HVAC and water heating, using less energy than can be achieved by use of resistive electric heaters.