Draft mechanism used for drawing air through a boiler, furnace, or water heater.
|List Options||Option Definition||Unit of Measure|
|Not applicable||Not applicable||None|
|Natural||A natural heater has no blower fan and does not connect to an A/C power source. A natural draft type tankless heater takes it's "intake" combustion air from inside the room in which the heater is mounted. It then uses a natural draft to pull the exhaust out through a flue pipe exhaust.||None|
|Mechanical forced||Mechanical forced draught is provided by means of a fan forcing air into the combustion chamber.||None|
|Mechanical induced||In mechanical induced draught exhaust gases are pulled out of the boiler by either a steam jet or an induced draught fan.||None|
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