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2. Pilot light - Wikipedia

   en.wikipedia.org/wiki/Pilot_light

   Now it is more common to light a burner electrically, but gas pilot lights are still used when a high energy ignition source is necessary, as in when lighting a large burner. A United States patent was filed May 13, 1922, for a "safety gas-control system" by two employees of the Newark, New Jersey–based Public Service Gas Company, Conrad ...

3. Forced-air gas - Wikipedia

   en.wikipedia.org/wiki/Forced-air_gas

   Older furnaces sometimes relied on gravity instead of a blower to circulate air. [1]Gas-fired forced-air furnaces have a burner in the furnace fueled by natural gas.A blower forces cold air through a heat exchanger and then through duct-work that distributes the hot air through the building. [2]

4. Furnace (central heating) - Wikipedia

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

   Diagram of natural draft gas furnace, early 20th century. The first category of furnaces is natural draft, atmospheric burner furnaces. These furnaces consisted of cast-iron or riveted-steel heat exchangers built within an outer shell of brick, masonry, or steel. The heat exchangers were vented through brick or masonry chimneys.

5. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   Primary energy sources may be fuels like coal or wood, oil, kerosene, natural gas, or electricity. Compared with systems such as fireplaces and wood stoves, a central heating plant offers improved uniformity of temperature control over a building, usually including automatic control of the furnace.

6. Forced-air - Wikipedia

   en.wikipedia.org/wiki/Forced-air

   A ribbon style (long with holes), inshot (torch-like), or oil type burner is located in the heat exchanger. Ignition is provided by an electric spark , standing pilot, or hot surface igniter. Safety devices ensure that combustion gases and/or unburned fuel do not accumulate in the event of an ignition failure or venting failure.

7. Single-ended recuperative burner - Wikipedia

   en.wikipedia.org/wiki/Single-ended_recuperative...

   A single-ended recuperative (SER) burner is a type of gas burner used in high-temperature industrial kilns and furnaces. These burners are used where indirect heating is required, e.g. where the products of combustion are not allowed to combine with the atmosphere of the furnace. The typical design is a tubular (pipe) shape with convoluted ...