CHAUFFAGE FRANCAIS Sannover Bedienungsanleitung Seite 28

1. Steel flue with double chamber insulated with material resistant to 400°C. Effciency 100% excellent.
2. Refractory flue with double insulated chamber and external coating in lightweight concrete. Effciency 100%
excellent.
3. Traditional clay flue square section with cavities. Effciency 80% good.
4. Avoid flues with rectangular internal section whose ratio differs from the drawing. Effciency 40% poor
PICTURE - 01
1. Industrial chimney cap with pre-fabricated elements – it allows an excellent discharge of the smokes.
2. Handicraft chimney cap. The right output section must be at least twice as big as the internal section of the flue
(ideal value: 2.5 times).
3. Chimney cap for steel flue with internal cone deflector of smokes.
4. In case of flues side by side, a chimney cap must be higher than the other one of at least 50 cm in order to avoid
pressure transfers between the flues themselves.
PICTURE - 02
The chimney cap must not show hindrances
within 10 m from walls, pitches and trees.
Otherwise raise it of at least 1 m over the
hindrance. The chimney cap must exceed
the ridge of the roof of at least 1 m.
PICTURE - 03
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