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2. Halogen lamp - Wikipedia

   en.wikipedia.org/wiki/Halogen_lamp

   Contaminants, because they absorb more light and heat than the glass does, will create a hot spot on the bulb surface when the lamp is turned on. This extreme, localized heat causes the quartz to change from its vitreous form into a weaker, crystalline form that leaks gas. This weakening may also cause the bulb to form a bubble, weakening it ...

3. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   When operating as a heater in cold weather, the warmed gas flows to a heat exchanger in the indoor space where some of its thermal energy is transferred to that indoor space, causing the gas to condense to its liquid state. The liquified refrigerant flows to a heat exchanger in the outdoor space where the pressure falls, the liquid evaporates ...

4. Kerosene heater - Wikipedia

   en.wikipedia.org/wiki/Kerosene_heater

   Most heaters contain a battery-operated or piezo-electric ignitor to light the heater without the need for matches. If the ignitor should fail the heater can still be lit manually. The Japanese non-vented "fan" heater burns kerosene gas and is known as a gasification type heater.

5. Gasoline heater - Wikipedia

   en.wikipedia.org/wiki/Gasoline_heater

   A gasoline heater is a small gasoline-fueled space-heater. Fixed versions were originally used mainly for supplemental heat for passenger compartments of automobiles and aircraft, with the latter still in production.

6. Oil heater - Wikipedia

   en.wikipedia.org/wiki/Oil_heater

   A typical oil heater. An oil heater, also known as an oil-filled heater, oil-filled radiator, or column heater, is a common form of convection heater used in domestic heating. Although filled with oil, it is electrically heated and does not involve burning any oil fuel; the oil is used as a heat reservoir (buffer).

7. Gas lighting - Wikipedia

   en.wikipedia.org/wiki/Gas_lighting

   Gas lighting in the historical center of Wrocław, Poland, is manually turned off and on daily.. Gas lighting is the production of artificial light from combustion of a fuel gas such as methane, propane, butane, acetylene, ethylene, hydrogen, carbon monoxide, coal gas (town gas) or natural gas.