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Regardless of age or condition, aircraft with exhaust shroud heating systems should contain a carbon monoxide detection device in the cockpit. 

## Combustion Heaters 

An aircraft combustion heater is used on many small to medium sized aircraft. It is a heat source independent from 

the aircraft’s engine(s), although it does use fuel from the aircraft’s main fuel system. Combustion heaters are manufactured by a few different companies that supply the aviation industry. Most are similar to the description that follows. The most up to date units have electronic ignition and temperature control switches. 

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