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3.3 CHIMNEY STACK
It is necessary to install a chimney stack at the top of the flue to facilitate the dispersion of fumes.
The chimney stack must comply with the following requirements:
a) Have the same diameter of the flue;
b) Be well-isolated;
c) Be located in the highest point;
d) Guarantee the correct dispersion of fumes in any weather conditions (strong wind, rain, etc.);
e) Be easy to remove to facilitate cleaning.
Attention: Use of metal and/or flexible pipes is strictly forbidden.