Answer Posted / magesh

Yes. The draft used is Induced draft. The draft is created
by a ID fan( Induced Draft). This fan sucks the flue gas
from the boiler furnace and forces out through chimney.
Usually the fan is controlled by a VFD where we can reduce
or increase the speed of the fan by adjusting the frequency.
As the power consumption of these fans are high, it is
better advisable to go with VFD( Variable Frequency Drive).
The technical specification of these fans can be googled.
Thanks.

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