Wolf COB Technical Manual And Installation Instructions page 60

Minimum duct sizes for room sealed operation C93x
Assuming:
1 x 87° bend + 1.5 m horizontal with 87° support bend
Flue DN60 (COB-15)
15
13
11
9
7
5
100 110 120
Square duct a x a (mm)
Flue DN80 (COB-15/20/29), DN110 (COB-40)
32
30
28
26
24
22
20
18
16
14
12
10
8
110 120
Square duct a x a (mm)
Minimum duct sizes for room sealed operation B23, B33 and
room sealed operation C53(x)
The space between the flue line and shaft shall be
continuously back-ventilated.
Due to the required secondary ventilation in accordance with
DIN 18160, when routing a balanced flue so that it is rigid and
flexible in a duct, the following min. shaft size is required.
Circular Ø Square
DN 60 130 mm
DN 80 150 mm
DN 110 190 mm
60
36 Technical information
Rigid flue DN60
Flexible flue DN60
130 140 150
COB-15/-20
COB-29
COB-40
130 140 150
110 mm
130 mm
170 mm
Flue DN60 (COB-15)
15
13
11
9
7
5
100 110
160
Round duct Ø (mm)
Flue DN80 (COB-15/20/29), DN110 (COB-40)
32
30
28
26
24
22
20
18
16
14
12
10
8
160 120 130
Round duct Ø (mm)
Rigid flue DN60
Flexible flue DN60
120 130 140 150
COB-15/-20
140 150 160
3062547_201802
160
COB-29
COB-40
170