Flue location
and ventilation
1
2 3
3465
Vitodens boilers can be installed in virtually all domestic applications,
some examples are illustrated.
The maximum flue length is the single
biggest consideration.
Maximum flue lengths are provided and
have already allowed for 2 bends of 87°
(including support bends).
For each additional 90° elbow reduce
the maximum flue length by 1 m, each
additional 45° elbow by 0.5 m.
As a rule of thumb increasing the diameter
of the flue from 60 mm to 80 mm will add
approximately 15% to the flue length, but
please check with the Viessmann Technical
Department if in doubt.
Flue applications
1
Vertical, concentric roof
terminal – flat and pitched
2
Communal flue system –
open flued
3
Horizontal concentric
4
Communal room
sealed chimney
5
Vertical outside wall system
6
Chimney flue (open flued/balance)
with flexible duct
Horizontal wall terminal
3
Part no. 60/100 80/125
1 Boiler flue connection
2 Balanced flue external wall connection
(incl. wall bezels) 7373237 Z006368
3 Protective grille 7189821 7189821
4 Balanced flue pipe
1 m long 7373224 7194321
0.5 m long 7373223 7194320
5 Balanced flue bend
87° 7373226 7194323
2 x 45° 7373227 7194324
Fixing clamp 7176762 7176664
Horizontal flue terminal kit Z009350
Flue terminal 1 m, 2 x wall seals,
balanced flue bend
87°
A Combustion air
B Flue gas
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