Baffling is a type of obstruction designed to deflect and regulate the speed of flue gases. They are especially
necessary for round boilers and furnaces constructed so that the flue passes are almost direct from the fire box. Furthermore,
boilers designed for burning coal are usually provided with relatively large flue passages, which are not
normally suited to the
higher flue gas velocities,
encountered in oil firing.
Baffling will, in most cases, help to
partly overcome the inefficient
operation resulting from the
usual excessively high stack gas temperatures. In such
instances it is advisable to experiment with various
methods of baffling. (Any
baffling of the flue
passes of a nature,
which prevents efficient operation of the burner, should not be done.
Another form of baffling is a
corbel or step out arrangement of the brick work of the rear wall, forming a target wall which the flame strikes and is curled back to
prevent short circuiting.