Viessmann Flue gas system Installation Instructions Manual page 24

Vertical outlet for sloping or flat roofs
When several roof outlets are installed side
by side, maintain a minimum clearance of 1.5
m between pipes and between flue terminals
and other structural elements. Observe the
clearance of the flue outlet above the roof
(see fig.). If the rated output is ≥50 kW, an
above roof extension is required (see page
28).
Ventilation air
A
Flue gas
B
Rated output kW
a (min.) mm
Boiler flue connection
1
Balanced flue roof outlet
2
Pipe outlets for Klöber roof tiles (order
3
the corresponding Klöber tile on site)
or
Universal roof tile
or
Flat roof collar
Balanced flue inspection piece,
4
straight (optional)
Balanced flue sliding coupling
5
(optional)
Balanced flue bend
87° or 2 x 45°
Balanced flue pipe
1 m long
0.5 m long
Fixing clamp
≤ 50
≥50
400 1 000
23