4
slight draft good draft very strong draft
Figure 2
The flue is functioning well if it satisfies the following conditions (fig. 3):
- It protrudes above the roof top (ridge) at least 0,5m.
- It is higher than the neighboring house that is close to the flue, a tree or some other barrier.
- It is in the internal walls of the house or it is well insulated if it is in the external walls.
- The extension should be closely connected to the flue if it is being extended.
- The flue pipe should not be inserted deeply in the flue opening as this reduces the space for smoke output.
- All other unnecessary openings as well as the door for cleaning should be well closed (sealed) so that so called “false” air
would not be created.
AISI 316 steel chimney with double insulated chamber,
made of material resistant to 400°C. Optimal efficiency
100%
Fireproof chimney with double insulated chamber and an
outer lining of lightweight concrete.
Optimal efficiency 100%
Traditional clay chimney with recesses. Optimal efficiency
80%
It is forbidden to use chimney pipes that have a rectangular
internal cross-section with
a ratio that differs from the plan. Modest efficiency 40%
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