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Venting for Combustion Air
The following table lists the model types approved for use with the Centrotherm / Duravent flexible vent pipes
and the maximum allowable length of the vent system.
Model Type
Vent Dia.
Flexible PP
Flexible SS
Centrotherm
Innoflue Flex*
Duravent
Polypro Flex*
Duravent
FasNSeal**
NCB-190/060H
NCB-190/080H
2 in
35 ft
n/a
35 ft
3 in
100 ft
n/a
NCB-240/110H
NCB-240/130H
NCB-250/150H
2 in
n/a
n/a
35 ft
3 in
100 ft
n/a
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Only the flexible vent models listed above are approved for use with this appliance.
●
All flexible vent pipe must be installed VERTICALLY through the roof. No horizontal terminations are permitted.
●
Use a 2 in snap fit coupler or the InnoFlue® Single Wall Residential vent pipes to connect the InnoFlue® Flex 2 in
vent pipes to the exhaust.
●
After installation, ensure that the vent system is tightly sealed at the joints.
●
All installation using the flexible vent materials must be in INDIRECT VENTING only.
●
Refer to the manufacturer’s literature for detailed information and guidelines.
Summary of Contents for NCB-190/060H
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