Which of the following statement is TRUE about balanced draught?

1.	Which of the following statement is TRUE about balanced draught?
A.	No fan/blower is installed
B.	A fan/blower is installed in the middle of the chimney
C.	One fan/blower is installed at the base of the boiler and one near the base of the chimney
D.	Two fans/blowers are installed both at the base of the boiler
Answer» D. Two fans/blowers are installed both at the base of the boiler

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Which of the following statement is TRUE about balanced draught?

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