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2. Kerosene heater - Wikipedia

   en.wikipedia.org/wiki/Kerosene_heater

   However, most kerosene heaters do not require electricity to operate. 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.

3. Salamander heater - Wikipedia

   en.wikipedia.org/wiki/Salamander_heater

   Salamander heater. A salamander heater is any of a variety of portable forced-air or convection space heaters, often using kerosene or propane as fuel but also requiring electricity, [1] [2] used in ventilated areas for worksite comfort. Salamander heaters are most often found at construction sites. [3]

4. Outdoor heating - Wikipedia

   en.wikipedia.org/wiki/Outdoor_heating

   To this end, various outdoor heating appliances are available, including gas patio heaters, quartz or ceramic electric lamps, and wood burning chimenea and fire pits. [1] In an outdoor environment, convection would quickly carry away heat in the form of hot air, so all these methods emit various amounts of their total output as radiant heat ...

5. Patio heater - Wikipedia

   en.wikipedia.org/wiki/Patio_heater

   The below table correlates to the approximate power (BTU / Watts) required. Results may vary based on the outside temperature, obstructions and wind. Area Distance from heater Propane and natural gas heaters Electric heaters 4 sq ft 1 foot 10,000 BTUs 1,000 Watts 16 sq ft 2 feet 36 sq ft 3 feet 64 sq ft 4 feet 100 sq ft 5 feet 46,000 BTUs 144 sq ft

6. 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.

7. Ceramic heater - Wikipedia

   en.wikipedia.org/wiki/Ceramic_heater

   An electric current heats the block, which in turn heats the fins. The fins then heat the air. In another type of heating element, the honeycomb disk, the block of ceramic is perforated with numerous holes. The air is heated as it flows through the holes. No fins are required for honeycomb disk heating elements. [6]