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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. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   Manufactured fireplaces are made with sheet metal or glass fire boxes. Electric fireplaces can be built-in replacements for wood or gas or retrofit with log inserts or electric fireboxes. A few types are wall mounted electric fireplaces, electric fireplace stoves, electric mantel fireplaces, and fixed or free standing electric fireplaces.

4. Gas heater - Wikipedia

   en.wikipedia.org/wiki/Gas_heater

   Another example of a non-flued gas heater, running on natural gas. Non-flued heaters – also known as unvented heaters, vent-free heaters, or flueless fires, may be either permanently installed or portable, and sometimes incorporate a catalytic converter. [1] Non-flued heaters can be risky if appropriate safety procedures are not followed.

5. Smoke detector - Wikipedia

   en.wikipedia.org/wiki/Smoke_detector

   The first automatic electric fire alarm was patented in 1890 by Francis Robbins Upton, [2] an associate of Thomas Edison. [3] In 1902, George Andrew Darby patented the first European electrical heat detector in Birmingham, England. [4] [5] In the late 1930s, Swiss physicist Walter Jaeger attempted to invent a sensor for poison gas. [6]

6. Industrial furnace - Wikipedia

   en.wikipedia.org/wiki/Industrial_furnace

   Most pilot flames nowadays are lit by an ignition transformer (much like a car's spark plugs). The pilot flame in turn lights up the main flame. The pilot flame uses natural gas while the main flame can use both diesel and natural gas. When using liquid fuels, an atomizer is used, otherwise, the liquid fuel will simply pour onto the furnace ...

7. Electric heating - Wikipedia

   en.wikipedia.org/wiki/Electric_heating

   An electric heater is an electrical device that converts an electric current into heat. [1] The heating element inside every electric heater is an electrical resistor , and works on the principle of Joule heating : an electric current passing through a resistor will convert that electrical energy into heat energy.