The forced draft fan is connected to the lower duct which conveys the air through an ____ to preheat the air before it is admitted to the burners.

The forced draft fan is connected to the lower duct which conveys the air through an ____ to preheat the air before it is admitted to the burners.

The forced draft fan is connected to the lower duct which conveys the air through an ____ to preheat the air before it is admitted to the burners.




A. Windbox
B. Louver
C. Air heater
D. None of the above



Answer: C


Learn More :