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2. Direct vent fireplace - Wikipedia

   en.wikipedia.org/wiki/Direct_vent_fireplace

   Even a very efficient traditional fireplace only operates at about 15% efficiency. This is because most of the hot air generated by the fire travels up the chimney due to convection. A traditional fireplace can also draw hot air in from the room and expel it through the chimney, further lowering the efficiency. The design of the direct vent ...

3. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   Standard, modern, wood-burning masonry fireplaces though have an efficiency rating of at least 80% (legal minimum requirement, for example, in Salzburg, Austria). [11] To improve efficiency, fireplaces can also be modified by inserting special heavy fireboxes designed to burn much cleaner and can reach efficiencies as high as 80% in heating the ...

4. Stove - Wikipedia

   en.wikipedia.org/wiki/Stove

   Other efficient stoves are based on Top Lit updraft (T-LUD) or wood gas or smoke burner stove, a principle applied and made popular by Dr. Thomas Reed, which use small pieces of sticks, chips of wood or shavings, leaves, etc., as fuel. The efficiency is very high — up to 50 percent — as compared to traditional stoves that are 5 to 15 ...

5. Rocket mass heater - Wikipedia

   en.wikipedia.org/wiki/Rocket_mass_heater

   Proponents claim the exhaust gas mostly consists of carbon dioxide and steam, because a rocket stove in general is more efficient at burning fuel. [14] [16] The low thermal transmittance of the heat exchange mass allows slow release of heat after the fire is out. Some people claim their rocket mass heaters are capable of sufficiently heating ...

6. Gas burner - Wikipedia

   en.wikipedia.org/wiki/Gas_burner

   Propane burner with a Bunsen flame Oxy-Acetylene for cutting through steel rails Flame of a gas and oil, in a dual burner. A gas burner is a device that produces a non-controlled flame by mixing a fuel gas such as acetylene, natural gas, or propane with an oxidizer such as the ambient air or supplied oxygen, and allowing for ignition and ...

7. Gas stove - Wikipedia

   en.wikipedia.org/wiki/Gas_stove

   Mean benzene emissions from gas and propane burners on high and ovens set to 350 °F ranged from 2.8 to 6.5 μg min–1, 10 to 25 times higher than emissions from electric coil and radiant alternatives. [1] Some high-end cooktop models provide higher range of heat and heavy-duty burners that can go up to 6 kilowatts (20,000 BTU/h) or even more.