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2. Electric fireplace - Wikipedia

   en.wikipedia.org/wiki/Electric_fireplace

   The electric fire was invented in 1912 [2] and became popular in the 1950s. [3] Electric fireplaces found in 1950s homes were typically small and could be easily moved. [4] Techniques for electrical "flame effects" have been around since at least 1981. [5] Commercial electric fireplace techniques include the Optiflame, introduced in 1988 by ...

3. 48-volt electrical system - Wikipedia

   en.wikipedia.org/wiki/48-volt_electrical_system

   A 48 V system can provide more power, improve energy recuperation, [7] and allow up to an 85% decrease in cable mass. [10]12-volt systems can provide only 3.5 kilowatts, while a 48 V power could achieve 15 to 20 kW or even 50 kW. 48 volts is below the level that is considered safe in dry conditions without special protective measures. [11]

4. Plug-in electric vehicle fire - Wikipedia

   en.wikipedia.org/wiki/Plug-in_electric_vehicle_fire

   A fire in a Kona Electric occurred in Bucheon, Gyeonggi Province, South Korea on August 9, 2019. The flames began at the floor of the rear seat of the vehicle, which was parked at the time. [159] On August 13, 2019, a Kona Electric caught fire while being charged in an underground parking level at an apartment in Sejong City, South Korea.

5. Refrigeration - Wikipedia

   en.wikipedia.org/wiki/Refrigeration

   In 1911, GE released a household refrigeration unit that was powered by gas. The use of gas eliminated the need for an electric compressor motor and decreased the size of the refrigerator. However, electric companies that were customers of GE did not benefit from a gas-powered unit. Thus, GE invested in developing an electric model.

6. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space.

7. Heat pipe - Wikipedia

   en.wikipedia.org/wiki/Heat_pipe

   A pipe one inch in diameter and two feet long can transfer 3.7 kW (12.500 BTU per hour) at 1,800 °F (980 °C) with only 18 °F (10 °C) drop from end to end. [14] Some heat pipes have demonstrated a heat flux of more than 23 kW/cm 2 , about four times the heat flux through the surface of the Sun. [ 15 ]