c) Prevent the flue from ending in areas near to constructions and it must exceed the
closest peak in height, where there is a adjoining building.
d) The inside walls must be perfectly smooth and free of obstacles. At the joints of tubes
with brick chimneys, avoid bottlenecks.
e) It is very important for the tube joints to be well sealed to cover possible cracks that
allow air to enter.
Fig.-7
Fig.-8
Fig.-9
39