The main advantage of forced draft over natural draft is that
(A) Combustion of fuel is complete
(B) Smaller height chimney can be used
(C) Furnace control is easier
(D) All (A), (B) & (C)
(A) Combustion of fuel is complete
(B) Smaller height chimney can be used
(C) Furnace control is easier
(D) All (A), (B) & (C)