hergom SANTORINI Instructions D'installation, De Service Et De Maintenance page 24

g) It is vital that the chimney is at least one metre higher than the
highest part of the house. If the draft needs to be increased the chimney must be
higher.
Incorrect
h) The cowls must not impede the draft.
Incorrect
i) Clean the chimney at least once a year.
j) If simple, metal pipes are used the joins must be sealed with heat resistant
putty.
l) Metal, exterior chimneys must be made out of double, heat resistant
pipes, which have been specially constructed for solid fuel.
At least
1 metre higher
Fig.-9
Correct
Fig.-10
Fig.-11
24
Correct
At least the same
as the diameter