Wolf COB Installation Instructions And Technical Manual page 49

Minimum duct sizes
for balanced flue operation C93x
Assumptions: In the installation room,
2 x tee, 1 x 87° bend + 1.5 m horizontal
with 87° support bend
C93x
C93x balanced flue
Minimum duct sizes for open flue operation B23, B33 and
balanced flue operation C53(x), C83(x)
Balanced flue routing, rigid and flexible in a duct
Minimum duct sizes
Required secondary ventilation to DIN 18160
Round Ø
DN 80 150 mm
DN 110 190 mm
B23, B33 open flue
in a DN80 duct
3062547_201507
31. Design information
Square
130 mm
170 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)
Flue DN80 (COB-15/20/29), DN110 (COB-40)
32
30
28
26
24
22
20
18
16
14
12
10
8
120 130 140
Round duct Ø (mm)
COB-15/-20
130 140 150
COB-15/-20
150 160 170
C93x
B23/B33 open flue
in a DN80 duct
COB-29
COB-40
160
COB-29
COB-40
180
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