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Manage My Life

What is the difference between forced-draft and induced draft?

by Manage My Life Last activity date:
April 26th, 2007

What is the difference between forced-draft and induced draft?

Building Supplies , HVAC
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Manage My Life
Some burners use a forced-draft system rather than an induced-draft system. The difference here is that the forced draft system


combustion air into the com-bustion chamber, all the way through the furnace, and out the vent. The induced-draft fan


things through the furnace and then pushes them out the vent.

The advantage of the forced-draft fan is that the fan itself is not in the high temperature, acidic environment of the exhaust gases. The forced-draft fan only sees room air. It lives in a much friendlier environment and, therefore, may be less susceptible to failures. Induced-draft fans are one of the most common items to fail on high-efficiency furnaces.
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by Manage My Life
April 26th, 2007
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